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<title>The SplObserver interface</title>
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<h1 class="title">The SplObserver interface</h1>
<div class="partintro"><p class="verinfo">(PHP 5 >= 5.1.0)</p>
<div class="section" id="splobserver.intro">
<h2 class="title">Introduction</h2>
<p class="para">
The <strong class="classname">SplObserver</strong> interface is used alongside
<a href="class.splsubject.html" class="classname">SplSubject</a> to implement the Observer Design Pattern.
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<h2 class="title">Interface synopsis</h2>
<div class="classsynopsis">
<div class="ooclass"></div>
<div class="classsynopsisinfo">
<span class="ooclass">
<strong class="classname">SplObserver</strong>
</span>
{</div>
<div class="classsynopsisinfo classsynopsisinfo_comment">/* Methods */</div>
<div class="methodsynopsis dc-description">
<span class="modifier">abstract</span> <span class="modifier">public</span> <span class="type">void</span> <span class="methodname"><a href="splobserver.update.html" class="methodname">update</a></span>
( <span class="methodparam"><span class="type"><a href="class.splsubject.html" class="type SplSubject">SplSubject</a></span> <code class="parameter">$subject</code></span>
)</div>
}</div>
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<h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="splobserver.update.html">SplObserver::update</a> — Receive update from subject</li></ul>
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