<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Creates an alias for a class</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.call-user-method.html">call_user_method</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.class-exists.html">class_exists</a></div> <div class="up"><a href="ref.classobj.html">Classes/Object Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.class-alias" class="refentry"> <div class="refnamediv"> <h1 class="refname">class_alias</h1> <p class="verinfo">(PHP 5 >= 5.3.0)</p><p class="refpurpose"><span class="refname">class_alias</span> — <span class="dc-title">Creates an alias for a class</span></p> </div> <div class="refsect1 description" id="refsect1-function.class-alias-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>class_alias</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$original</code></span> , <span class="methodparam"><span class="type">string</span> <code class="parameter">$alias</code></span> [, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$autoload</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span> ] )</div> <p class="para rdfs-comment"> Creates an alias named <em><code class="parameter">alias</code></em> based on the user defined class <em><code class="parameter">original</code></em>. The aliased class is exactly the same as the original class. </p> </div> <div class="refsect1 parameters" id="refsect1-function.class-alias-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">original</code></em></span> <dd> <p class="para"> The original class. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">alias</code></em></span> <dd> <p class="para"> The alias name for the class. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">autoload</code></em></span> <dd> <p class="para"> Whether do autoload if the original class is not found. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.class-alias-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure. </p> </div> <div class="refsect1 examples" id="refsect1-function.class-alias-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-5044"> <p><strong>Example #1 <span class="function"><strong>class_alias()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">class </span><span style="color: #0000BB">foo </span><span style="color: #007700">{ }<br /><br /></span><span style="color: #0000BB">class_alias</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">, </span><span style="color: #DD0000">'bar'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$a </span><span style="color: #007700">= new </span><span style="color: #0000BB">foo</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= new </span><span style="color: #0000BB">bar</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// the objects are the same<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$a </span><span style="color: #007700">== </span><span style="color: #0000BB">$b</span><span style="color: #007700">, </span><span style="color: #0000BB">$a </span><span style="color: #007700">=== </span><span style="color: #0000BB">$b</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$a </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">$b</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// the classes are the same<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$a </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">foo</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$a </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">bar</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$b </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">foo</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$b </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">bar</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> bool(true) bool(false) bool(true) bool(true) bool(true) bool(true) bool(true) </pre></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.class-alias-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.get-parent-class.html" class="function" rel="rdfs-seeAlso">get_parent_class()</a> - Retrieves the parent class name for object or class</span></li> <li class="member"> <span class="function"><a href="function.is-subclass-of.html" class="function" rel="rdfs-seeAlso">is_subclass_of()</a> - Checks if the object has this class as one of its parents</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.call-user-method.html">call_user_method</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.class-exists.html">class_exists</a></div> <div class="up"><a href="ref.classobj.html">Classes/Object Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>