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| author | Andrey Andreev <narf@devilix.net> | 2018-06-12 15:45:46 +0200 |
|---|---|---|
| committer | Andrey Andreev <narf@devilix.net> | 2018-06-12 15:45:46 +0200 |
| commit | 30e2eafa86c4c7b6b39cea3e7089a90df9f603fb (patch) | |
| tree | 391bc1e62d8d0ad045e18a6da72e3e2a59e91503 /user_guide/libraries/loader.html | |
| parent | a9da3dd2f16a8f97d7bc4ff5572b28e4bb84c813 (diff) | |
[ci skip] 3.1.9 release
Diffstat (limited to 'user_guide/libraries/loader.html')
| -rw-r--r-- | user_guide/libraries/loader.html | 1213 |
1 files changed, 1213 insertions, 0 deletions
diff --git a/user_guide/libraries/loader.html b/user_guide/libraries/loader.html new file mode 100644 index 000000000..35baf6d25 --- /dev/null +++ b/user_guide/libraries/loader.html @@ -0,0 +1,1213 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Loader Class — CodeIgniter 3.1.9 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <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'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="index" title="Index" + href="../genindex.html"/> + <link rel="search" title="Search" href="../search.html"/> + <link rel="top" title="CodeIgniter 3.1.9 documentation" href="../index.html"/> + <link rel="up" title="Libraries" href="index.html"/> + <link rel="next" title="Migrations Class" href="migration.html"/> + <link rel="prev" title="Language Class" href="language.html"/> + + + <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script> + +</head> + +<body class="wy-body-for-nav" role="document"> + + <div id="nav"> + <div id="nav_inner"> + + + + <div id="pulldown-menu" class="ciNav"> + <ul> +<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li> +<li class="toctree-l2"><a class="reference internal" 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href="../contributing/index.html">Contributing to CodeIgniter</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li> +<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li> +<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li> +</ul> +</li> +</ul> +<ul class="current"> +<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current"> +<li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li> +<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="cart.html">Shopping Cart Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="config.html">Config Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="email.html">Email Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="encrypt.html">Encrypt Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="encryption.html">Encryption Library</a></li> +<li class="toctree-l2"><a class="reference internal" href="file_uploading.html">File Uploading Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="form_validation.html">Form Validation</a></li> +<li class="toctree-l2"><a class="reference internal" href="ftp.html">FTP Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="image_lib.html">Image Manipulation Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="input.html">Input Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="javascript.html">Javascript Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="language.html">Language Class</a></li> +<li class="toctree-l2 current"><a class="current reference internal" href="#">Loader Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="migration.html">Migrations Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="output.html">Output Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="pagination.html">Pagination Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="parser.html">Template Parser Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="security.html">Security Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="sessions.html">Session Library</a></li> +<li class="toctree-l2"><a class="reference internal" href="table.html">HTML Table Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="trackback.html">Trackback Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="typography.html">Typography Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="unit_testing.html">Unit Testing Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="uri.html">URI Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="user_agent.html">User Agent Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li> +<li class="toctree-l2"><a class="reference internal" href="zip.html">Zip Encoding Class</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li> +</ul> +</li> +</ul> +<ul> +<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul> +<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li> +<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> +</ul> +</li> +</ul> + + + + </div> + + </nav> + + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> + + + <nav class="wy-nav-top" role="navigation" aria-label="top navigation"> + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../index.html">CodeIgniter</a> + </nav> + + + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="breadcrumbs navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../index.html">Docs</a> »</li> + + <li><a href="index.html">Libraries</a> »</li> + + <li>Loader Class</li> + <li class="wy-breadcrumbs-aside"> + + </li> + <div style="float:right;margin-left:5px;" id="closeMe"> + <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" /> + </div> + </ul> + <hr/> +</div> + <div role="main" class="document"> + + <div class="section" id="loader-class"> +<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"><span class="doc">View files</span></a>, +<a class="reference internal" href="../general/drivers.html"><span class="doc">Drivers</span></a>, +<a class="reference internal" href="../general/helpers.html"><span class="doc">Helpers</span></a>, +<a class="reference internal" href="../general/models.html"><span class="doc">Models</span></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> +</ul> +</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 <code class="docutils literal"><span class="pre">add_package_path()</span></code> 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 <code class="docutils literal"><span class="pre">add_package_path()</span></code> +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 <code class="docutils literal"><span class="pre">add_package_path()</span></code>.</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">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'welcome_message'</span><span class="p">);</span> <span class="c1">// Loads</span> +</pre></div> +</div> +</div> +</div> +<div class="section" id="class-reference"> +<h2><a class="toc-backref" href="#id4">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2> +<dl class="class"> +<dt id="CI_Loader"> +<em class="property">class </em><code class="descname">CI_Loader</code><a class="headerlink" href="#CI_Loader" title="Permalink to this definition">¶</a></dt> +<dd><dl class="method"> +<dt id="CI_Loader::library"> +<code class="descname">library</code><span class="sig-paren">(</span><em>$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><span class="sig-paren">)</span><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 <code class="docutils literal"><span class="pre">$this->email</span></code>.</p> +<p>Library files can be stored in subdirectories within the main +“libraries” directory, or within your personal <em>application/libraries</em> +directory. To load a file located in a subdirectory, simply include the +path, relative to the “libraries” directory. For example, if you have +file located at:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">libraries</span><span class="o">/</span><span class="nx">flavors</span><span class="o">/</span><span class="nx">Chocolate</span><span class="o">.</span><span class="nx">php</span> +</pre></div> +</div> +<p>You will load it using:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$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">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="s1">'table'</span><span class="p">));</span> +</pre></div> +</div> +<p><strong>Setting options</strong></p> +<p>The second (optional) parameter allows you to optionally pass +configuration setting. You will typically pass these as an array:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span> <span class="p">(</span> + <span class="s1">'mailtype'</span> <span class="o">=></span> <span class="s1">'html'</span><span class="p">,</span> + <span class="s1">'charset'</span> <span class="o">=></span> <span class="s1">'utf-8'</span><span class="p">,</span> + <span class="s1">'priority'</span> <span class="o">=></span> <span class="s1">'1'</span> +<span class="p">);</span> + +<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="nv">$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>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 +<code class="docutils literal"><span class="pre">$this->calendar</span></code>.</p> +<p>If you prefer to set your own class names you can pass its value to the +third parameter:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$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">$this</span><span class="o">-></span><span class="na">my_calendar</span> +</pre></div> +</div> +<p>Please take note, when multiple libraries are supplied in an array for +the first parameter, this parameter is discarded.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::driver"> +<code class="descname">driver</code><span class="sig-paren">(</span><em>$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><span class="sig-paren">)</span><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>$object_name</strong> (<em>string</em>) – Optional object name to assign the library to</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p> +</td> +</tr> +</tbody> +</table> +<p>This method is used to load driver libraries, acts very much like the +<code class="docutils literal"><span class="pre">library()</span></code> method.</p> +<p>As an example, if you would like to use sessions with CodeIgniter, the first +step is to load the session driver within your controller:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$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 <code class="docutils literal"><span class="pre">$this->session</span></code>.</p> +<p>Driver files must be stored in a subdirectory within the main +“libraries” directory, or within your personal <em>application/libraries</em> +directory. The subdirectory must match the parent class name. Read the +<a class="reference internal" href="../general/drivers.html"><span class="doc">Drivers</span></a> description for details.</p> +<p>Additionally, multiple driver libraries can be loaded at the same time by +passing an array of drivers to the load method.</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$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">$config</span><span class="p">);</span> +</pre></div> +</div> +<p>Config options can usually also be set via a config file. Each library +is explained in detail in its own page, so please read the information +regarding each one you would like to use.</p> +<p><strong>Assigning a Driver to a different object name</strong></p> +<p>If the third (optional) parameter is blank, the library will be assigned +to an object with the same name as the parent class. For example, if +the library is named Session, it will be assigned to a variable named +<code class="docutils literal"><span class="pre">$this->session</span></code>.</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"> +<code class="descname">view</code><span class="sig-paren">(</span><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><span class="sig-paren">)</span><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 $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>This method is used to load your View files. If you haven’t read the +<a class="reference internal" href="../general/views.html"><span class="doc">Views</span></a> section of the user guide it is +recommended that you do since it shows you how this method is +typically used.</p> +<p>The first parameter is required. It is the name of the view file you +would like to load.</p> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">The .php file extension does not need to be specified unless +you use something other than .php.</p> +</div> +<p>The second <strong>optional</strong> parameter can take an associative array or an +object as input, which it runs through the PHP +<a class="reference external" href="http://php.net/extract">extract()</a> function to convert to variables +that can be used in your view files. Again, read the +<a class="reference internal" href="../general/views.html"><span class="doc">Views</span></a> page to learn how this might be useful.</p> +<p>The third <strong>optional</strong> parameter lets you change the behavior of the +method so that it returns data as a string rather than sending it to +your browser. This can be useful if you want to process the data in some +way. If you set the parameter to TRUE (boolean) it will return data. The +default behavior is FALSE, which sends it to your browser. Remember to +assign it to a variable if you want the data returned:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$string</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">view</span><span class="p">(</span><span class="s1">'myfile'</span><span class="p">,</span> <span class="s1">''</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> +</pre></div> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::vars"> +<code class="descname">vars</code><span class="sig-paren">(</span><em>$vars</em><span class="optional">[</span>, <em>$val = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::vars" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$vars</strong> (<em>mixed</em>) – An array of variables or a single variable name</li> +<li><strong>$val</strong> (<em>mixed</em>) – Optional variable value</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p> +</td> +</tr> +</tbody> +</table> +<p>This method takes an associative array as input and generates +variables using the PHP <a class="reference external" href="http://php.net/extract">extract()</a> +function. This method produces the same result as using the second +parameter of the <code class="docutils literal"><span class="pre">$this->load->view()</span></code> 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"> +<code class="descname">get_var</code><span class="sig-paren">(</span><em>$key</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_var" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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 <code class="docutils literal"><span class="pre">$this->load->vars()</span></code>.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::get_vars"> +<code class="descname">get_vars</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_vars" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">An array of all assigned view variables</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td> +</tr> +</tbody> +</table> +<p>This method retrieves all variables available to your views.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::clear_vars"> +<code class="descname">clear_vars</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::clear_vars" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">CI_Loader instance (method chaining)</td> +</tr> +<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">CI_Loader</td> +</tr> +</tbody> +</table> +<p>Clears cached view variables.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::model"> +<code class="descname">model</code><span class="sig-paren">(</span><em>$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><span class="sig-paren">)</span><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">$this</span><span class="o">-></span><span class="na">fubar</span><span class="o">-></span><span class="na">method</span><span class="p">();</span> +</pre></div> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::database"> +<code class="descname">database</code><span class="sig-paren">(</span><span class="optional">[</span><em>$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><span class="sig-paren">)</span><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 $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>This method lets you load the database class. The two parameters are +<strong>optional</strong>. Please see the <a class="reference internal" href="../database/index.html"><span class="doc">database</span></a> +section for more info.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::dbforge"> +<code class="descname">dbforge</code><span class="sig-paren">(</span><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::dbforge" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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 $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>Loads the <a class="reference internal" href="../database/forge.html"><span class="doc">Database Forge</span></a> class, please refer +to that manual for more info.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::dbutil"> +<code class="descname">dbutil</code><span class="sig-paren">(</span><span class="optional">[</span><em>$db = NULL</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::dbutil" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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 $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>Loads the <a class="reference internal" href="../database/utilities.html"><span class="doc">Database Utilities</span></a> class, please +refer to that manual for more info.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::helper"> +<code class="descname">helper</code><span class="sig-paren">(</span><em>$helpers</em><span class="sig-paren">)</span><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>$helpers</strong> (<em>mixed</em>) – Helper name as a string or an array containing multiple helpers</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p> +</td> +</tr> +</tbody> +</table> +<p>This method loads helper files, where file_name is the name of the +file, without the _helper.php extension.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::file"> +<code class="descname">file</code><span class="sig-paren">(</span><em>$path</em><span class="optional">[</span>, <em>$return = FALSE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::file" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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 $return is set to TRUE, otherwise CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p> +</td> +</tr> +</tbody> +</table> +<p>This is a generic file loading method. Supply the filepath and name in +the first parameter and it will open and read the file. By default the +data is sent to your browser, just like a View file, but if you set the +second parameter to boolean TRUE it will instead return the data as a +string.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::language"> +<code class="descname">language</code><span class="sig-paren">(</span><em>$files</em><span class="optional">[</span>, <em>$lang = ''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::language" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$files</strong> (<em>mixed</em>) – Language file name or an array of multiple language files</li> +<li><strong>$lang</strong> (<em>string</em>) – Language name</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p> +</td> +</tr> +</tbody> +</table> +<p>This method is an alias of the <a class="reference internal" href="language.html"><span class="doc">language loading +method</span></a>: <code class="docutils literal"><span class="pre">$this->lang->load()</span></code>.</p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::config"> +<code class="descname">config</code><span class="sig-paren">(</span><em>$file</em><span class="optional">[</span>, <em>$use_sections = FALSE</em><span class="optional">[</span>, <em>$fail_gracefully = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::config" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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"><span class="doc">config file loading +method</span></a>: <code class="docutils literal"><span class="pre">$this->config->load()</span></code></p> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::is_loaded"> +<code class="descname">is_loaded</code><span class="sig-paren">(</span><em>$class</em><span class="sig-paren">)</span><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"> +<code class="descname">add_package_path</code><span class="sig-paren">(</span><em>$path</em><span class="optional">[</span>, <em>$view_cascade = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><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">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">add_package_path</span><span class="p">(</span><span class="nx">APPPATH</span><span class="o">.</span><span class="s1">'third_party/foo_bar/'</span><span class="p">)</span> + <span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'foo_bar'</span><span class="p">);</span> +</pre></div> +</div> +</dd></dl> + +<dl class="method"> +<dt id="CI_Loader::remove_package_path"> +<code class="descname">remove_package_path</code><span class="sig-paren">(</span><span class="optional">[</span><em>$path = ''</em><span class="optional">]</span><span class="sig-paren">)</span><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>$path</strong> (<em>string</em>) – Path to remove</li> +</ul> +</td> +</tr> +<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">CI_Loader instance (method chaining)</p> +</td> +</tr> +<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">CI_Loader</p> +</td> +</tr> +</tbody> +</table> +<p>When your controller is finished using resources from an application +package, and particularly if you have other application packages you +want to work with, you may wish to remove the package path so the Loader +no longer looks in that directory for resources. To remove the last path +added, simply call the method with no parameters.</p> +<p>Or to remove a specific package path, specify the same path previously +given to <code class="docutils literal"><span class="pre">add_package_path()</span></code> for a package.:</p> +<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$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"> +<code class="descname">get_package_paths</code><span class="sig-paren">(</span><span class="optional">[</span><em>$include_base = TRUE</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Loader::get_package_paths" title="Permalink to this definition">¶</a></dt> +<dd><table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple"> +<li><strong>$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> + +</dd></dl> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="migration.html" class="btn btn-neutral float-right" title="Migrations Class">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="language.html" class="btn btn-neutral" title="Language Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2018, British Columbia Institute of Technology. + Last updated on Jun 12, 2018. + </p> + </div> + + Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. + +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'3.1.9', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: false + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html>
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