<!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>Count elements of an object</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.countable.html">Countable</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.outeriterator.html">OuterIterator</a></div> <div class="up"><a href="class.countable.html">Countable</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="countable.count" class="refentry"> <div class="refnamediv"> <h1 class="refname">Countable::count</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">Countable::count</span> — <span class="dc-title">Count elements of an object</span></p> </div> <div class="refsect1 description" id="refsect1-countable.count-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="modifier">abstract</span> <span class="modifier">public</span> <span class="type">int</span> <span class="methodname"><strong>Countable::count</strong></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> This method is executed when using the <span class="function"><a href="function.count.html" class="function">count()</a></span> function on an object implementing <a href="class.countable.html" class="classname">Countable</a>. </p> </div> <div class="refsect1 parameters" id="refsect1-countable.count-parameters"> <h3 class="title">Parameters</h3> <p class="para">This function has no parameters.</p> </div> <div class="refsect1 returnvalues" id="refsect1-countable.count-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The custom count as an <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>. </p> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> The return value is cast to an <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>. </p> </p></blockquote> </div> <div class="refsect1 examples" id="refsect1-countable.count-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-3909"> <p><strong>Example #1 <span class="function"><strong>Countable::count()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">myCounter </span><span style="color: #007700">implements </span><span style="color: #0000BB">Countable </span><span style="color: #007700">{<br /> private </span><span style="color: #0000BB">$count </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /> public function </span><span style="color: #0000BB">count</span><span style="color: #007700">() {<br /> return ++</span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">count</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #0000BB">$counter </span><span style="color: #007700">= new </span><span style="color: #0000BB">myCounter</span><span style="color: #007700">;<br /><br />for(</span><span style="color: #0000BB">$i</span><span style="color: #007700">=</span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700"><</span><span style="color: #0000BB">10</span><span style="color: #007700">; ++</span><span style="color: #0000BB">$i</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"I have been count()ed " </span><span style="color: #007700">. </span><span style="color: #0000BB">count</span><span style="color: #007700">(</span><span style="color: #0000BB">$counter</span><span style="color: #007700">) . </span><span style="color: #DD0000">" times\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> I have been count()ed 1 times I have been count()ed 2 times I have been count()ed 3 times I have been count()ed 4 times I have been count()ed 5 times I have been count()ed 6 times I have been count()ed 7 times I have been count()ed 8 times I have been count()ed 9 times I have been count()ed 10 times </pre></div> </div> </div> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="class.countable.html">Countable</a></div> <div class="next" style="text-align: right; float: right;"><a href="class.outeriterator.html">OuterIterator</a></div> <div class="up"><a href="class.countable.html">Countable</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>