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<title>Checks if the class method exists</title>
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<h1 class="refname">method_exists</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">method_exists</span> — <span class="dc-title">Checks if the class method exists</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.method-exists-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>method_exists</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$object</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$method_name</code></span>
)</div>
<p class="para rdfs-comment">
Checks if the class method exists in the given
<em><code class="parameter">object</code></em>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.method-exists-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">object</code></em></span>
<dd>
<p class="para">
An object instance or a class name
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">method_name</code></em></span>
<dd>
<p class="para">
The method name
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.method-exists-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the method given by <em><code class="parameter">method_name</code></em>
has been defined for the given <em><code class="parameter">object</code></em>, <strong><code>FALSE</code></strong>
otherwise.
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.method-exists-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">Using this function will use any registered
<a href="language.oop5.autoload.html" class="link">autoloaders</a> if the class is not already known.</p></p></blockquote>
</div>
<div class="refsect1 examples" id="refsect1-function.method-exists-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-5062">
<p><strong>Example #1 <span class="function"><strong>method_exists()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$directory </span><span style="color: #007700">= new </span><span style="color: #0000BB">Directory</span><span style="color: #007700">(</span><span style="color: #DD0000">'.'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">method_exists</span><span style="color: #007700">(</span><span style="color: #0000BB">$directory</span><span style="color: #007700">,</span><span style="color: #DD0000">'read'</span><span style="color: #007700">));<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)
</pre></div>
</div>
</div>
<div class="example" id="example-5063">
<p><strong>Example #2 Static <span class="function"><strong>method_exists()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">method_exists</span><span style="color: #007700">(</span><span style="color: #DD0000">'Directory'</span><span style="color: #007700">,</span><span style="color: #DD0000">'read'</span><span style="color: #007700">));<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)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.method-exists-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.function-exists.html" class="function" rel="rdfs-seeAlso">function_exists()</a> - Return TRUE if the given function has been defined</span></li>
<li class="member"> <span class="function"><a href="function.is-callable.html" class="function" rel="rdfs-seeAlso">is_callable()</a> - Verify that the contents of a variable can be called as a function</span></li>
<li class="member"> <span class="function"><a href="function.class-exists.html" class="function" rel="rdfs-seeAlso">class_exists()</a> - Checks if the class has been defined</span></li>
</ul>
</p>
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