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<title>The setCallback purpose</title>
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<h1 class="refname">EventListener::setCallback</h1>
<p class="verinfo">(PECL event >= 1.2.6-beta)</p><p class="refpurpose"><span class="refname">EventListener::setCallback</span> — <span class="dc-title">The setCallback purpose</span></p>
</div>
<div class="refsect1 description" id="refsect1-eventlistener.setcallback-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span>
<span class="type"><span class="type void">void</span></span>
<span class="methodname"><strong>EventListener::setCallback</strong></span>
( <span class="methodparam">
<span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span>
<code class="parameter">$cb</code>
</span>
[, <span class="methodparam">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span>
<code class="parameter">$arg</code>
<span class="initializer"> = <strong><code>NULL</code></strong></span>
</span>
] )</div>
<p class="para rdfs-comment">
Adjust event connect listener's callback and optionally the callback
argument.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-eventlistener.setcallback-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term">
<em><code class="parameter">cb</code></em>
</span>
<dd>
<p class="para">
The new callback for new connections. Ignored if <strong><code>NULL</code></strong>.
</p>
<p class="para">
Should match the following prototype:
</p>
<div class="methodsynopsis dc-description">
<span class="type"><span class="type void">void</span></span>
<span class="methodname"><strong>callback</strong></span>
([ <span class="methodparam">
<span class="type"><a href="class.eventlistener.html" class="type EventListener">EventListener</a></span>
<code class="parameter">$listener</code>
<span class="initializer"> = <strong><code>NULL</code></strong></span>
</span>
[, <span class="methodparam">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span>
<code class="parameter">$fd</code>
<span class="initializer"> = <strong><code>NULL</code></strong></span>
</span>
[, <span class="methodparam">
<span class="type">array</span>
<code class="parameter">$address</code>
<span class="initializer"> = <strong><code>NULL</code></strong></span>
</span>
[, <span class="methodparam">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span>
<code class="parameter">$arg</code>
<span class="initializer"> = <strong><code>NULL</code></strong></span>
</span>
]]]] )</div>
<p class="para">
<dl>
<dt>
<span class="term">
<em><code class="parameter">listener</code></em>
</span>
<dd>
<p class="para">
The
<a href="class.eventlistener.html" class="classname">EventListener</a>
object.
</p>
</dd>
</dt>
<dt>
<span class="term">
<em><code class="parameter">fd</code></em>
</span>
<dd>
<p class="para">
The file descriptor or a resource associated with the listener.
</p>
</dd>
</dt>
<dt>
<span class="term">
<em><code class="parameter">address</code></em>
</span>
<dd>
<p class="para">
Array of two elements: IP address and the
<em class="emphasis">server</em>
port.
</p>
</dd>
</dt>
<dt>
<span class="term">
<em><code class="parameter">arg</code></em>
</span>
<dd>
<p class="para">
User custom data attached to the callback.
</p>
</dd>
</dt>
</dl>
</p>
</dd>
</dt>
<dt>
<span class="term">
<em><code class="parameter">arg</code></em>
</span>
<dd>
<p class="para">
Custom user data attached to the callback. Ignored if <strong><code>NULL</code></strong>.
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-eventlistener.setcallback-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
No value is returned.
</p>
</div>
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