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diff --git a/user_guide/general/creating_libraries.html b/user_guide/general/creating_libraries.html deleted file mode 100644 index ea4ed00ca..000000000 --- a/user_guide/general/creating_libraries.html +++ /dev/null @@ -1,754 +0,0 @@ - - -<!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>Creating Libraries — CodeIgniter 3.1.10 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"/> - 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class="reference internal" href="helpers.html">Helpers</a></li> -<li class="toctree-l2"><a class="reference internal" href="libraries.html">Using CodeIgniter Libraries</a></li> -<li class="toctree-l2 current"><a class="current reference internal" href="#">Creating Libraries</a></li> -<li class="toctree-l2"><a class="reference internal" href="drivers.html">Using CodeIgniter Drivers</a></li> -<li class="toctree-l2"><a class="reference internal" href="creating_drivers.html">Creating Drivers</a></li> -<li class="toctree-l2"><a class="reference internal" href="core_classes.html">Creating Core System Classes</a></li> -<li class="toctree-l2"><a class="reference internal" href="ancillary_classes.html">Creating Ancillary Classes</a></li> -<li class="toctree-l2"><a class="reference internal" href="hooks.html">Hooks - Extending the Framework Core</a></li> -<li class="toctree-l2"><a class="reference internal" href="autoloader.html">Auto-loading Resources</a></li> -<li class="toctree-l2"><a class="reference internal" href="common_functions.html">Common Functions</a></li> -<li class="toctree-l2"><a class="reference internal" href="compatibility_functions.html">Compatibility Functions</a></li> -<li class="toctree-l2"><a class="reference internal" href="routing.html">URI Routing</a></li> -<li class="toctree-l2"><a class="reference internal" href="errors.html">Error Handling</a></li> -<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching</a></li> -<li class="toctree-l2"><a class="reference internal" href="profiling.html">Profiling Your Application</a></li> -<li class="toctree-l2"><a class="reference internal" href="cli.html">Running via the CLI</a></li> -<li class="toctree-l2"><a class="reference internal" href="managing_apps.html">Managing your Applications</a></li> -<li class="toctree-l2"><a class="reference internal" href="environments.html">Handling Multiple Environments</a></li> -<li class="toctree-l2"><a class="reference internal" href="alternative_php.html">Alternate PHP Syntax for View Files</a></li> -<li class="toctree-l2"><a class="reference internal" href="security.html">Security</a></li> -<li class="toctree-l2"><a class="reference internal" href="styleguide.html">PHP Style Guide</a></li> -</ul> -</li> -</ul> -<ul> -<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul> -<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li> 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Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li> -<li class="toctree-l2"><a class="reference internal" href="../libraries/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">General Topics</a> »</li> - - <li>Creating Libraries</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="creating-libraries"> -<h1>Creating Libraries<a class="headerlink" href="#creating-libraries" title="Permalink to this headline">¶</a></h1> -<p>When we use the term “Libraries” we are normally referring to the -classes that are located in the libraries directory and described in the -Class Reference of this user guide. In this case, however, we will -instead describe how you can create your own libraries within your -application/libraries directory in order to maintain separation between -your local resources and the global framework resources.</p> -<p>As an added bonus, CodeIgniter permits your libraries to extend native -classes if you simply need to add some functionality to an existing -library. Or you can even replace native libraries just by placing -identically named versions in your <em>application/libraries</em> directory.</p> -<p>In summary:</p> -<ul class="simple"> -<li>You can create entirely new libraries.</li> -<li>You can extend native libraries.</li> -<li>You can replace native libraries.</li> -</ul> -<p>The page below explains these three concepts in detail.</p> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">The Database classes can not be extended or replaced with your -own classes. All other classes are able to be replaced/extended.</p> -</div> -<div class="section" id="storage"> -<h2>Storage<a class="headerlink" href="#storage" title="Permalink to this headline">¶</a></h2> -<p>Your library classes should be placed within your <em>application/libraries</em> -directory, as this is where CodeIgniter will look for them when they are -initialized.</p> -</div> -<div class="section" id="naming-conventions"> -<h2>Naming Conventions<a class="headerlink" href="#naming-conventions" title="Permalink to this headline">¶</a></h2> -<ul class="simple"> -<li>File names must be capitalized. For example: Myclass.php</li> -<li>Class declarations must be capitalized. For example: class Myclass</li> -<li>Class names and file names must match.</li> -</ul> -</div> -<div class="section" id="the-class-file"> -<h2>The Class File<a class="headerlink" href="#the-class-file" title="Permalink to this headline">¶</a></h2> -<p>Classes should have this basic prototype:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> -<span class="nb">defined</span><span class="p">(</span><span class="s1">'BASEPATH'</span><span class="p">)</span> <span class="k">OR</span> <span class="k">exit</span><span class="p">(</span><span class="s1">'No direct script access allowed'</span><span class="p">);</span> - -<span class="k">class</span> <span class="nc">Someclass</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">some_method</span><span class="p">()</span> - <span class="p">{</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">We are using the name Someclass purely as an example.</p> -</div> -</div> -<div class="section" id="using-your-class"> -<h2>Using Your Class<a class="headerlink" href="#using-your-class" title="Permalink to this headline">¶</a></h2> -<p>From within any of your <a class="reference internal" href="controllers.html"><span class="doc">Controller</span></a> methods you -can initialize your class using the standard:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'someclass'</span><span class="p">);</span> -</pre></div> -</div> -<p>Where <em>someclass</em> is the file name, without the “.php” file extension. -You can submit the file name capitalized or lower case. CodeIgniter -doesn’t care.</p> -<p>Once loaded you can access your class using the lower case version:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">someclass</span><span class="o">-></span><span class="na">some_method</span><span class="p">();</span><span class="nx"> </span> <span class="c1">// Object instances will always be lower case</span> -</pre></div> -</div> -</div> -<div class="section" id="passing-parameters-when-initializing-your-class"> -<h2>Passing Parameters When Initializing Your Class<a class="headerlink" href="#passing-parameters-when-initializing-your-class" title="Permalink to this headline">¶</a></h2> -<p>In the library loading method you can dynamically pass data as an -array via the second parameter and it will be passed to your class -constructor:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$params</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'type'</span> <span class="o">=></span> <span class="s1">'large'</span><span class="p">,</span> <span class="s1">'color'</span> <span class="o">=></span> <span class="s1">'red'</span><span class="p">);</span> - -<span class="nv">$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">'someclass'</span><span class="p">,</span> <span class="nv">$params</span><span class="p">);</span> -</pre></div> -</div> -<p>If you use this feature you must set up your class constructor to expect -data:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><?</span><span class="nx">php</span> <span class="nb">defined</span><span class="p">(</span><span class="s1">'BASEPATH'</span><span class="p">)</span> <span class="k">OR</span> <span class="k">exit</span><span class="p">(</span><span class="s1">'No direct script access allowed'</span><span class="p">);</span> - -<span class="k">class</span> <span class="nc">Someclass</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">(</span><span class="nv">$params</span><span class="p">)</span> - <span class="p">{</span> - <span class="c1">// Do something with $params</span> - <span class="p">}</span> -<span class="p">}</span> -</pre></div> -</div> -<p>You can also pass parameters stored in a config file. Simply create a -config file named identically to the class file name and store it in -your <em>application/config/</em> directory. Note that if you dynamically pass -parameters as described above, the config file option will not be -available.</p> -</div> -<div class="section" id="utilizing-codeigniter-resources-within-your-library"> -<h2>Utilizing CodeIgniter Resources within Your Library<a class="headerlink" href="#utilizing-codeigniter-resources-within-your-library" title="Permalink to this headline">¶</a></h2> -<p>To access CodeIgniter’s native resources within your library use the -<code class="docutils literal"><span class="pre">get_instance()</span></code> method. This method returns the CodeIgniter super -object.</p> -<p>Normally from within your controller methods you will call any of the -available CodeIgniter methods using the <code class="docutils literal"><span class="pre">$this</span></code> construct:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'url'</span><span class="p">);</span> -<span class="nv">$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">'session'</span><span class="p">);</span> -<span class="nv">$this</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'base_url'</span><span class="p">);</span> -<span class="c1">// etc.</span> -</pre></div> -</div> -<p><code class="docutils literal"><span class="pre">$this</span></code>, however, only works directly within your controllers, your -models, or your views. If you would like to use CodeIgniter’s classes -from within your own custom classes you can do so as follows:</p> -<p>First, assign the CodeIgniter object to a variable:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$CI</span> <span class="o">=&</span> <span class="nx">get_instance</span><span class="p">();</span> -</pre></div> -</div> -<p>Once you’ve assigned the object to a variable, you’ll use that variable -<em>instead</em> of <code class="docutils literal"><span class="pre">$this</span></code>:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$CI</span> <span class="o">=&</span> <span class="nx">get_instance</span><span class="p">();</span> - -<span class="nv">$CI</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'url'</span><span class="p">);</span> -<span class="nv">$CI</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'session'</span><span class="p">);</span> -<span class="nv">$CI</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'base_url'</span><span class="p">);</span> -<span class="c1">// etc.</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p>You’ll notice that the above <code class="docutils literal"><span class="pre">get_instance()</span></code> function is being -passed by reference:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$CI</span> <span class="o">=&</span> <span class="nx">get_instance</span><span class="p">();</span> -</pre></div> -</div> -<p class="last">This is very important. Assigning by reference allows you to use the -original CodeIgniter object rather than creating a copy of it.</p> -</div> -<p>However, since a library is a class, it would be better if you -take full advantage of the OOP principles. So, in order to -be able to use the CodeIgniter super-object in all of the class -methods, you’re encouraged to assign it to a property instead:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">Example_library</span> <span class="p">{</span> - - <span class="k">protected</span> <span class="nv">$CI</span><span class="p">;</span> - - <span class="c1">// We'll use a constructor, as you can't directly call a function</span> - <span class="c1">// from a property definition.</span> - <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span> - <span class="p">{</span> - <span class="c1">// Assign the CodeIgniter super-object</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">CI</span> <span class="o">=&</span> <span class="nx">get_instance</span><span class="p">();</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">foo</span><span class="p">()</span> - <span class="p">{</span> - <span class="nv">$this</span><span class="o">-></span><span class="na">CI</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'url'</span><span class="p">);</span> - <span class="nx">redirect</span><span class="p">();</span> - <span class="p">}</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">bar</span><span class="p">()</span> - <span class="p">{</span> - <span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">CI</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'base_url'</span><span class="p">);</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -</div> -<div class="section" id="replacing-native-libraries-with-your-versions"> -<h2>Replacing Native Libraries with Your Versions<a class="headerlink" href="#replacing-native-libraries-with-your-versions" title="Permalink to this headline">¶</a></h2> -<p>Simply by naming your class files identically to a native library will -cause CodeIgniter to use it instead of the native one. To use this -feature you must name the file and the class declaration exactly the -same as the native library. For example, to replace the native Email -library you’ll create a file named <em>application/libraries/Email.php</em>, -and declare your class with:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">CI_Email</span> <span class="p">{</span> - -<span class="p">}</span> -</pre></div> -</div> -<p>Note that most native classes are prefixed with CI_.</p> -<p>To load your library you’ll see the standard loading method:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">);</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">At this time the Database classes can not be replaced with -your own versions.</p> -</div> -</div> -<div class="section" id="extending-native-libraries"> -<h2>Extending Native Libraries<a class="headerlink" href="#extending-native-libraries" title="Permalink to this headline">¶</a></h2> -<p>If all you need to do is add some functionality to an existing library - -perhaps add a method or two - then it’s overkill to replace the entire -library with your version. In this case it’s better to simply extend the -class. Extending a class is nearly identical to replacing a class with a -couple exceptions:</p> -<ul class="simple"> -<li>The class declaration must extend the parent class.</li> -<li>Your new class name and filename must be prefixed with MY_ (this -item is configurable. See below.).</li> -</ul> -<p>For example, to extend the native Email class you’ll create a file named -<em>application/libraries/MY_Email.php</em>, and declare your class with:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">MY_Email</span> <span class="k">extends</span> <span class="nx">CI_Email</span> <span class="p">{</span> - -<span class="p">}</span> -</pre></div> -</div> -<p>If you need to use a constructor in your class make sure you -extend the parent constructor:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">class</span> <span class="nc">MY_Email</span> <span class="k">extends</span> <span class="nx">CI_Email</span> <span class="p">{</span> - - <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">(</span><span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span><span class="p">())</span> - <span class="p">{</span> - <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">(</span><span class="nv">$config</span><span class="p">);</span> - <span class="c1">// Your own constructor code</span> - <span class="p">}</span> - -<span class="p">}</span> -</pre></div> -</div> -<div class="admonition note"> -<p class="first admonition-title">Note</p> -<p class="last">Not all of the libraries have the same (or any) parameters -in their constructor. Take a look at the library that you’re -extending first to see how it should be implemented.</p> -</div> -<div class="section" id="loading-your-sub-class"> -<h3>Loading Your Sub-class<a class="headerlink" href="#loading-your-sub-class" title="Permalink to this headline">¶</a></h3> -<p>To load your sub-class you’ll use the standard syntax normally used. DO -NOT include your prefix. For example, to load the example above, which -extends the Email class, you will use:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">library</span><span class="p">(</span><span class="s1">'email'</span><span class="p">);</span> -</pre></div> -</div> -<p>Once loaded you will use the class variable as you normally would for -the class you are extending. In the case of the email class all calls -will use:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">email</span><span class="o">-></span><span class="na">some_method</span><span class="p">();</span> -</pre></div> -</div> -</div> -<div class="section" id="setting-your-own-prefix"> -<h3>Setting Your Own Prefix<a class="headerlink" href="#setting-your-own-prefix" title="Permalink to this headline">¶</a></h3> -<p>To set your own sub-class prefix, open your -<em>application/config/config.php</em> file and look for this item:</p> -<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'subclass_prefix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'MY_'</span><span class="p">;</span> -</pre></div> -</div> -<p>Please note that all native CodeIgniter libraries are prefixed with CI_ -so DO NOT use that as your prefix.</p> -</div> -</div> -</div> - - - </div> - <footer> - - <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> - - <a href="drivers.html" class="btn btn-neutral float-right" title="Using CodeIgniter Drivers">Next <span class="fa fa-arrow-circle-right"></span></a> - - - <a href="libraries.html" class="btn btn-neutral" title="Using CodeIgniter Libraries"><span class="fa fa-arrow-circle-left"></span> Previous</a> - - </div> - - - <hr/> - - <div role="contentinfo"> - <p> - © Copyright 2014 - 2019, British Columbia Institute of Technology. - Last updated on Jan 16, 2019. - </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:'3.1.10', - 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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