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| <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> |
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