<!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>Checks if the trait exists</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.property-exists.html">property_exists</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.classkit.html">Classkit</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.trait-exists" class="refentry"> <div class="refnamediv"> <h1 class="refname">trait_exists</h1> <p class="verinfo">(PHP 5 >= 5.4.0)</p><p class="refpurpose"><span class="refname">trait_exists</span> — <span class="dc-title">Checks if the trait exists</span></p> </div> <div class="refsect1 description" id="refsect1-function.trait-exists-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>trait_exists</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$traitname</code></span> [, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$autoload</code></span> ] )</div> <p class="para rdfs-comment"> </p> </div> <div class="refsect1 parameters" id="refsect1-function.trait-exists-parameters"> <h3 class="title">Parameters</h3> <dl> <dt> <span class="term"><em><code class="parameter">traitname</code></em></span> <dd> <p class="para"> Name of the trait to check </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">autoload</code></em></span> <dd> <p class="para"> Whether to autoload if not already loaded. </p> </dd> </dt> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-function.trait-exists-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> if trait exists, <strong><code>FALSE</code></strong> if not, <strong><code>NULL</code></strong> in case of an error. </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.property-exists.html">property_exists</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.classkit.html">Classkit</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>