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1214 lines
78 KiB
1214 lines
78 KiB
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<!DOCTYPE html>
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<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Loader Class — CodeIgniter 3.1.4 documentation</title>
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<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
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<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
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<link rel="top" title="CodeIgniter 3.1.4 documentation" href="../index.html"/>
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<link rel="up" title="Libraries" href="index.html"/>
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<link rel="next" title="Migrations Class" href="migration.html"/>
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<link rel="prev" title="Language Class" href="language.html"/>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a><ul class="simple">
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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</ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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</ul>
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</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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</ul>
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</li>
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</ul>
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<ul class="current">
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<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current">
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<li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li>
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<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li>
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<li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li>
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<li class="toctree-l2 current"><a class="current reference internal" href="">Loader Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li>
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<li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="uri.html">URI Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
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</ul>
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</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
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</ul>
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</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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</ul>
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</li>
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</ul>
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</div>
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<li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="uri.html">URI Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
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<div class="section" id="loader-class">
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<h1>Loader Class<a class="headerlink" href="#loader-class" title="Permalink to this headline">¶</a></h1>
|
|
<p>Loader, as the name suggests, is used to load elements. These elements
|
|
can be libraries (classes) <a class="reference internal" href="../general/views.html"><em>View files</em></a>,
|
|
<a class="reference internal" href="../general/drivers.html"><em>Drivers</em></a>,
|
|
<a class="reference internal" href="../general/helpers.html"><em>Helpers</em></a>,
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|
<a class="reference internal" href="../general/models.html"><em>Models</em></a>, or your own files.</p>
|
|
<div class="admonition note">
|
|
<p class="first admonition-title">Note</p>
|
|
<p class="last">This class is initialized automatically by the system so there
|
|
is no need to do it manually.</p>
|
|
</div>
|
|
<div class="contents local topic" id="contents">
|
|
<ul class="simple">
|
|
<li><a class="reference internal" href="#application-packages" id="id2">Application “Packages”</a><ul>
|
|
<li><a class="reference internal" href="#package-view-files" id="id3">Package view files</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a class="reference internal" href="#class-reference" id="id4">Class Reference</a></li>
|
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</ul>
|
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</div>
|
|
<div class="custom-index container"></div><div class="section" id="application-packages">
|
|
<h2><a class="toc-backref" href="#id2">Application “Packages”</a><a class="headerlink" href="#application-packages" title="Permalink to this headline">¶</a></h2>
|
|
<p>An application package allows for the easy distribution of complete sets
|
|
of resources in a single directory, complete with its own libraries,
|
|
models, helpers, config, and language files. It is recommended that
|
|
these packages be placed in the application/third_party directory. Below
|
|
is a sample map of an package directory.</p>
|
|
<p>The following is an example of a directory for an application package
|
|
named “Foo Bar”.</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">/</span><span class="nx">application</span><span class="o">/</span><span class="nx">third_party</span><span class="o">/</span><span class="nx">foo_bar</span>
|
|
|
|
<span class="nx">config</span><span class="o">/</span>
|
|
<span class="nx">helpers</span><span class="o">/</span>
|
|
<span class="nx">language</span><span class="o">/</span>
|
|
<span class="nx">libraries</span><span class="o">/</span>
|
|
<span class="nx">models</span><span class="o">/</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Whatever the purpose of the “Foo Bar” application package, it has its
|
|
own config files, helpers, language files, libraries, and models. To use
|
|
these resources in your controllers, you first need to tell the Loader
|
|
that you are going to be loading resources from a package, by adding the
|
|
package path via the <tt class="docutils literal"><span class="pre">add_package_path()</span></tt> method.</p>
|
|
<div class="section" id="package-view-files">
|
|
<h3><a class="toc-backref" href="#id3">Package view files</a><a class="headerlink" href="#package-view-files" title="Permalink to this headline">¶</a></h3>
|
|
<p>By Default, package view files paths are set when <tt class="docutils literal"><span class="pre">add_package_path()</span></tt>
|
|
is called. View paths are looped through, and once a match is
|
|
encountered that view is loaded.</p>
|
|
<p>In this instance, it is possible for view naming collisions within
|
|
packages to occur, and possibly the incorrect package being loaded. To
|
|
ensure against this, set an optional second parameter of FALSE when
|
|
calling <tt class="docutils literal"><span class="pre">add_package_path()</span></tt>.</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">);</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'my_app_index'</span><span class="p">);</span> <span class="c1">// Loads</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'welcome_message'</span><span class="p">);</span> <span class="c1">// Will not load the default welcome_message b/c the second param to add_package_path is FALSE</span>
|
|
|
|
<span class="c1">// Reset things</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">remove_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">);</span>
|
|
|
|
<span class="c1">// Again without the second parameter:</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'my_app'</span><span class="p">);</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'my_app_index'</span><span class="p">);</span> <span class="c1">// Loads</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'welcome_message'</span><span class="p">);</span> <span class="c1">// Loads</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="class-reference">
|
|
<h2><a class="toc-backref" href="#id4">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
|
|
<dl class="class">
|
|
<dt id="CI_Loader">
|
|
<em class="property">class </em><tt class="descname">CI_Loader</tt><a class="headerlink" href="#CI_Loader" title="Permalink to this definition">¶</a></dt>
|
|
<dd><dl class="method">
|
|
<dt id="CI_Loader::library">
|
|
<tt class="descname">library</tt><big>(</big><em>$library</em><span class="optional">[</span>, <em>$params = NULL</em><span class="optional">[</span>, <em>$object_name = NULL</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::library" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$library</strong> (<em>mixed</em>) – Library name as a string or an array with multiple libraries</li>
|
|
<li><strong>$params</strong> (<em>array</em>) – Optional array of parameters to pass to the loaded library’s constructor</li>
|
|
<li><strong>$object_name</strong> (<em>string</em>) – Optional object name to assign the library to</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method is used to load core classes.</p>
|
|
<div class="admonition note">
|
|
<p class="first admonition-title">Note</p>
|
|
<p class="last">We use the terms “class” and “library” interchangeably.</p>
|
|
</div>
|
|
<p>For example, if you would like to send email with CodeIgniter, the first
|
|
step is to load the email class within your controller:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Once loaded, the library will be ready for use, using <tt class="docutils literal"><span class="pre">$this->email</span></tt>.</p>
|
|
<p>Library files can be stored in subdirectories within the main
|
|
“libraries” directory, or within your personal <em>application/libraries</em>
|
|
directory. To load a file located in a subdirectory, simply include the
|
|
path, relative to the “libraries” directory. For example, if you have
|
|
file located at:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">libraries</span><span class="o">/</span><span class="nx">flavors</span><span class="o">/</span><span class="nx">Chocolate</span><span class="o">.</span><span class="nx">php</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>You will load it using:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'flavors/chocolate'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>You may nest the file in as many subdirectories as you want.</p>
|
|
<p>Additionally, multiple libraries can be loaded at the same time by
|
|
passing an array of libraries to the load method.</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="s1">'table'</span><span class="p">));</span>
|
|
</pre></div>
|
|
</div>
|
|
<p><strong>Setting options</strong></p>
|
|
<p>The second (optional) parameter allows you to optionally pass
|
|
configuration setting. You will typically pass these as an array:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span>$config = array (
|
|
'mailtype' => 'html',
|
|
'charset' => 'utf-8,
|
|
'priority' => '1'
|
|
);
|
|
|
|
$this->load->library('email', $config);
|
|
</pre></div>
|
|
</div>
|
|
<p>Config options can usually also be set via a config file. Each library
|
|
is explained in detail in its own page, so please read the information
|
|
regarding each one you would like to use.</p>
|
|
<p>Please take note, when multiple libraries are supplied in an array for
|
|
the first parameter, each will receive the same parameter information.</p>
|
|
<p><strong>Assigning a Library to a different object name</strong></p>
|
|
<p>If the third (optional) parameter is blank, the library will usually be
|
|
assigned to an object with the same name as the library. For example, if
|
|
the library is named Calendar, it will be assigned to a variable named
|
|
<tt class="docutils literal"><span class="pre">$this->calendar</span></tt>.</p>
|
|
<p>If you prefer to set your own class names you can pass its value to the
|
|
third parameter:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'calendar'</span><span class="p">,</span> <span class="k">NULL</span><span class="p">,</span> <span class="s1">'my_calendar'</span><span class="p">);</span>
|
|
|
|
<span class="c1">// Calendar class is now accessed using:</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">my_calendar</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Please take note, when multiple libraries are supplied in an array for
|
|
the first parameter, this parameter is discarded.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::driver">
|
|
<tt class="descname">driver</tt><big>(</big><em>$library</em><span class="optional">[</span>, <em>$params = NULL</em><span class="optional">[</span>, <em>$object_name</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::driver" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$library</strong> (<em>mixed</em>) – Library name as a string or an array with multiple libraries</li>
|
|
<li><strong>$params</strong> (<em>array</em>) – Optional array of parameters to pass to the loaded library’s constructor</li>
|
|
<li><strong>$object_name</strong> (<em>string</em>) – Optional object name to assign the library to</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method is used to load driver libraries, acts very much like the
|
|
<tt class="docutils literal"><span class="pre">library()</span></tt> method.</p>
|
|
<p>As an example, if you would like to use sessions with CodeIgniter, the first
|
|
step is to load the session driver within your controller:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'session'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Once loaded, the library will be ready for use, using <tt class="docutils literal"><span class="pre">$this->session</span></tt>.</p>
|
|
<p>Driver files must be stored in a subdirectory within the main
|
|
“libraries” directory, or within your personal <em>application/libraries</em>
|
|
directory. The subdirectory must match the parent class name. Read the
|
|
<a class="reference internal" href="../general/drivers.html"><em>Drivers</em></a> description for details.</p>
|
|
<p>Additionally, multiple driver libraries can be loaded at the same time by
|
|
passing an array of drivers to the load method.</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="s1">'cache'</span><span class="p">));</span>
|
|
</pre></div>
|
|
</div>
|
|
<p><strong>Setting options</strong></p>
|
|
<p>The second (optional) parameter allows you to optionally pass
|
|
configuration settings. You will typically pass these as an array:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
|
<span class="s1">'sess_driver'</span> <span class="o">=></span> <span class="s1">'cookie'</span><span class="p">,</span>
|
|
<span class="s1">'sess_encrypt_cookie'</span> <span class="o">=></span> <span class="k">true</span><span class="p">,</span>
|
|
<span class="s1">'encryption_key'</span> <span class="o">=></span> <span class="s1">'mysecretkey'</span>
|
|
<span class="p">);</span>
|
|
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">driver</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>Config options can usually also be set via a config file. Each library
|
|
is explained in detail in its own page, so please read the information
|
|
regarding each one you would like to use.</p>
|
|
<p><strong>Assigning a Driver to a different object name</strong></p>
|
|
<p>If the third (optional) parameter is blank, the library will be assigned
|
|
to an object with the same name as the parent class. For example, if
|
|
the library is named Session, it will be assigned to a variable named
|
|
<tt class="docutils literal"><span class="pre">$this->session</span></tt>.</p>
|
|
<p>If you prefer to set your own class names you can pass its value to the
|
|
third parameter:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'session'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="s1">'my_session'</span><span class="p">);</span>
|
|
|
|
<span class="c1">// Session class is now accessed using:</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">my_session</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::view">
|
|
<tt class="descname">view</tt><big>(</big><em>$view</em><span class="optional">[</span>, <em>$vars = array()</em><span class="optional">[</span>, <em>return = FALSE</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::view" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$view</strong> (<em>string</em>) – View name</li>
|
|
<li><strong>$vars</strong> (<em>array</em>) – An associative array of variables</li>
|
|
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded view</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">View content string if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method is used to load your View files. If you haven’t read the
|
|
<a class="reference internal" href="../general/views.html"><em>Views</em></a> section of the user guide it is
|
|
recommended that you do since it shows you how this method is
|
|
typically used.</p>
|
|
<p>The first parameter is required. It is the name of the view file you
|
|
would like to load.</p>
|
|
<div class="admonition note">
|
|
<p class="first admonition-title">Note</p>
|
|
<p class="last">The .php file extension does not need to be specified unless
|
|
you use something other than .php.</p>
|
|
</div>
|
|
<p>The second <strong>optional</strong> parameter can take an associative array or an
|
|
object as input, which it runs through the PHP
|
|
<a class="reference external" href="http://php.net/extract">extract()</a> function to convert to variables
|
|
that can be used in your view files. Again, read the
|
|
<a class="reference internal" href="../general/views.html"><em>Views</em></a> page to learn how this might be useful.</p>
|
|
<p>The third <strong>optional</strong> parameter lets you change the behavior of the
|
|
method so that it returns data as a string rather than sending it to
|
|
your browser. This can be useful if you want to process the data in some
|
|
way. If you set the parameter to TRUE (boolean) it will return data. The
|
|
default behavior is FALSE, which sends it to your browser. Remember to
|
|
assign it to a variable if you want the data returned:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$string</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'myfile'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::vars">
|
|
<tt class="descname">vars</tt><big>(</big><em>$vars</em><span class="optional">[</span>, <em>$val = ''</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::vars" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$vars</strong> (<em>mixed</em>) – An array of variables or a single variable name</li>
|
|
<li><strong>$val</strong> (<em>mixed</em>) – Optional variable value</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method takes an associative array as input and generates
|
|
variables using the PHP <a class="reference external" href="http://php.net/extract">extract()</a>
|
|
function. This method produces the same result as using the second
|
|
parameter of the <tt class="docutils literal"><span class="pre">$this->load->view()</span></tt> method above. The reason you
|
|
might want to use this method independently is if you would like to
|
|
set some global variables in the constructor of your controller and have
|
|
them become available in any view file loaded from any method. You can
|
|
have multiple calls to this method. The data get cached and merged
|
|
into one array for conversion to variables.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::get_var">
|
|
<tt class="descname">get_var</tt><big>(</big><em>$key</em><big>)</big><a class="headerlink" href="#CI_Loader::get_var" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$key</strong> (<em>string</em>) – Variable name key</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Value if key is found, NULL if not</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method checks the associative array of variables available to
|
|
your views. This is useful if for any reason a var is set in a library
|
|
or another controller method using <tt class="docutils literal"><span class="pre">$this->load->vars()</span></tt>.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::get_vars">
|
|
<tt class="descname">get_vars</tt><big>(</big><big>)</big><a class="headerlink" href="#CI_Loader::get_vars" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">An array of all assigned view variables</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method retrieves all variables available to your views.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::clear_vars">
|
|
<tt class="descname">clear_vars</tt><big>(</big><big>)</big><a class="headerlink" href="#CI_Loader::clear_vars" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_Loader instance (method chaining)</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_Loader</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Clears cached view variables.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::model">
|
|
<tt class="descname">model</tt><big>(</big><em>$model</em><span class="optional">[</span>, <em>$name = ''</em><span class="optional">[</span>, <em>$db_conn = FALSE</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::model" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$model</strong> (<em>mixed</em>) – Model name or an array containing multiple models</li>
|
|
<li><strong>$name</strong> (<em>string</em>) – Optional object name to assign the model to</li>
|
|
<li><strong>$db_conn</strong> (<em>string</em>) – Optional database configuration group to load</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>If your model is located in a subdirectory, include the relative path
|
|
from your models directory. For example, if you have a model located at
|
|
<em>application/models/blog/Queries.php</em> you’ll load it using:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'blog/queries'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
<p>If you would like your model assigned to a different object name you can
|
|
specify it via the second parameter of the loading method:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">model</span><span class="p">(</span><span class="s1">'model_name'</span><span class="p">,</span> <span class="s1">'fubar'</span><span class="p">);</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">fubar</span><span class="o">-></span><span class="na">method</span><span class="p">();</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::database">
|
|
<tt class="descname">database</tt><big>(</big><span class="optional">[</span><em>$params = ''</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">[</span>, <em>$query_builder = NULL</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::database" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$params</strong> (<em>mixed</em>) – Database group name or configuration options</li>
|
|
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded database object</li>
|
|
<li><strong>$query_builder</strong> (<em>bool</em>) – Whether to load the Query Builder</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB instance or FALSE on failure if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method lets you load the database class. The two parameters are
|
|
<strong>optional</strong>. Please see the <a class="reference internal" href="../database/index.html"><em>database</em></a>
|
|
section for more info.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::dbforge">
|
|
<tt class="descname">dbforge</tt><big>(</big><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::dbforge" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$db</strong> (<em>object</em>) – Database object</li>
|
|
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the Database Forge instance</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB_forge instance if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Loads the <a class="reference internal" href="../database/forge.html"><em>Database Forge</em></a> class, please refer
|
|
to that manual for more info.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::dbutil">
|
|
<tt class="descname">dbutil</tt><big>(</big><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::dbutil" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$db</strong> (<em>object</em>) – Database object</li>
|
|
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the Database Utilities instance</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Loaded CI_DB_utility instance if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Loads the <a class="reference internal" href="../database/utilities.html"><em>Database Utilities</em></a> class, please
|
|
refer to that manual for more info.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::helper">
|
|
<tt class="descname">helper</tt><big>(</big><em>$helpers</em><big>)</big><a class="headerlink" href="#CI_Loader::helper" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$helpers</strong> (<em>mixed</em>) – Helper name as a string or an array containing multiple helpers</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method loads helper files, where file_name is the name of the
|
|
file, without the _helper.php extension.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::file">
|
|
<tt class="descname">file</tt><big>(</big><em>$path</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::file" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$path</strong> (<em>string</em>) – File path</li>
|
|
<li><strong>$return</strong> (<em>bool</em>) – Whether to return the loaded file</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">File contents if $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This is a generic file loading method. Supply the filepath and name in
|
|
the first parameter and it will open and read the file. By default the
|
|
data is sent to your browser, just like a View file, but if you set the
|
|
second parameter to boolean TRUE it will instead return the data as a
|
|
string.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::language">
|
|
<tt class="descname">language</tt><big>(</big><em>$files</em><span class="optional">[</span>, <em>$lang = ''</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::language" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$files</strong> (<em>mixed</em>) – Language file name or an array of multiple language files</li>
|
|
<li><strong>$lang</strong> (<em>string</em>) – Language name</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method is an alias of the <a class="reference internal" href="language.html"><em>language loading
|
|
method</em></a>: <tt class="docutils literal"><span class="pre">$this->lang->load()</span></tt>.</p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::config">
|
|
<tt class="descname">config</tt><big>(</big><em>$file</em><span class="optional">[</span>, <em>$use_sections = FALSE</em><span class="optional">[</span>, <em>$fail_gracefully = FALSE</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::config" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$file</strong> (<em>string</em>) – Configuration file name</li>
|
|
<li><strong>$use_sections</strong> (<em>bool</em>) – Whether configuration values should be loaded into their own section</li>
|
|
<li><strong>$fail_gracefully</strong> (<em>bool</em>) – Whether to just return FALSE in case of failure</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>This method is an alias of the <a class="reference internal" href="config.html"><em>config file loading
|
|
method</em></a>: <tt class="docutils literal"><span class="pre">$this->config->load()</span></tt></p>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::is_loaded">
|
|
<tt class="descname">is_loaded</tt><big>(</big><em>$class</em><big>)</big><a class="headerlink" href="#CI_Loader::is_loaded" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$class</strong> (<em>string</em>) – Class name</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Singleton property name if found, FALSE if not</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Allows you to check if a class has already been loaded or not.</p>
|
|
<div class="admonition note">
|
|
<p class="first admonition-title">Note</p>
|
|
<p class="last">The word “class” here refers to libraries and drivers.</p>
|
|
</div>
|
|
<p>If the requested class has been loaded, the method returns its assigned
|
|
name in the CI Super-object and FALSE if it’s not:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">);</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Form_validation'</span><span class="p">);</span> <span class="c1">// returns 'form_validation'</span>
|
|
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Nonexistent_library'</span><span class="p">);</span> <span class="c1">// returns FALSE</span>
|
|
</pre></div>
|
|
</div>
|
|
<div class="admonition important">
|
|
<p class="first admonition-title">Important</p>
|
|
<p class="last">If you have more than one instance of a class (assigned to
|
|
different properties), then the first one will be returned.</p>
|
|
</div>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">,</span> <span class="nv">$config</span><span class="p">,</span> <span class="s1">'fv'</span><span class="p">);</span>
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'form_validation'</span><span class="p">);</span>
|
|
|
|
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">is_loaded</span><span class="p">(</span><span class="s1">'Form_validation'</span><span class="p">);</span> <span class="c1">// returns 'fv'</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::add_package_path">
|
|
<tt class="descname">add_package_path</tt><big>(</big><em>$path</em><span class="optional">[</span>, <em>$view_cascade = TRUE</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::add_package_path" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$path</strong> (<em>string</em>) – Path to add</li>
|
|
<li><strong>$view_cascade</strong> (<em>bool</em>) – Whether to use cascading views</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Adding a package path instructs the Loader class to prepend a given path
|
|
for subsequent requests for resources. As an example, the “Foo Bar”
|
|
application package above has a library named Foo_bar.php. In our
|
|
controller, we’d do the following:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'third_party/foo_bar/'</span><span class="p">)</span>
|
|
<span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'foo_bar'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::remove_package_path">
|
|
<tt class="descname">remove_package_path</tt><big>(</big><span class="optional">[</span><em>$path = ''</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::remove_package_path" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$path</strong> (<em>string</em>) – Path to remove</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>When your controller is finished using resources from an application
|
|
package, and particularly if you have other application packages you
|
|
want to work with, you may wish to remove the package path so the Loader
|
|
no longer looks in that directory for resources. To remove the last path
|
|
added, simply call the method with no parameters.</p>
|
|
<p>Or to remove a specific package path, specify the same path previously
|
|
given to <tt class="docutils literal"><span class="pre">add_package_path()</span></tt> for a package.:</p>
|
|
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">remove_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'third_party/foo_bar/'</span><span class="p">);</span>
|
|
</pre></div>
|
|
</div>
|
|
</dd></dl>
|
|
|
|
<dl class="method">
|
|
<dt id="CI_Loader::get_package_paths">
|
|
<tt class="descname">get_package_paths</tt><big>(</big><span class="optional">[</span><em>$include_base = TRUE</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#CI_Loader::get_package_paths" title="Permalink to this definition">¶</a></dt>
|
|
<dd><table class="docutils field-list" frame="void" rules="none">
|
|
<col class="field-name" />
|
|
<col class="field-body" />
|
|
<tbody valign="top">
|
|
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
|
<li><strong>$include_base</strong> (<em>bool</em>) – Whether to include BASEPATH</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">An array of package paths</p>
|
|
</td>
|
|
</tr>
|
|
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>Returns all currently available package paths.</p>
|
|
</dd></dl>
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