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<title>The Countable interface</title>
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<h1 class="title">The Countable interface</h1>
<div class="partintro"><p class="verinfo">(PHP 5 >= 5.1.0)</p>
<div class="section" id="countable.intro">
<h2 class="title">Introduction</h2>
<p class="para">
Classes implementing <strong class="classname">Countable</strong> can be used with the
<span class="function"><a href="function.count.html" class="function">count()</a></span> function.
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<div class="section" id="countable.synopsis">
<h2 class="title">Interface synopsis</h2>
<div class="classsynopsis">
<div class="ooclass"></div>
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<span class="ooclass">
<strong class="classname">Countable</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">int</span> <span class="methodname"><a href="countable.count.html" class="methodname">count</a></span>
( <span class="methodparam">void</span>
)</div>
}</div>
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<h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="countable.count.html">Countable::count</a> — Count elements of an object</li></ul>
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