<!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>Get size of shared memory block</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.shmop-read.html">shmop_read</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.shmop-write.html">shmop_write</a></div> <div class="up"><a href="ref.shmop.html">Shared Memory Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.shmop-size" class="refentry"> <div class="refnamediv"> <h1 class="refname">shmop_size</h1> <p class="verinfo">(PHP 4 >= 4.0.4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">shmop_size</span> — <span class="dc-title">Get size of shared memory block</span></p> </div> <div class="refsect1 description" id="refsect1-function.shmop-size-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>shmop_size</strong></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$shmid</code></span> )</div> <p class="para rdfs-comment"> <span class="function"><strong>shmop_size()</strong></span> is used to get the size, in bytes of the shared memory block. </p> </div> <div class="refsect1 parameters" id="refsect1-function.shmop-size-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <code class="parameter">shmid</code></dt> <dd> <p class="para"> The shared memory block identifier created by <span class="function"><a href="function.shmop-open.html" class="function">shmop_open()</a></span> </p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.shmop-size-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an int, which represents the number of bytes the shared memory block occupies. </p> </div> <div class="refsect1 changelog" id="refsect1-function.shmop-size-changelog"> <h3 class="title">Changelog</h3> <table class="doctable informaltable"> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody class="tbody"> <tr> <td>7.0.0</td> <td> The type of <code class="parameter">shmid</code> has been changed from <span class="type"><a href="language.types.integer.html" class="type int">int</a></span> to <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>. </td> </tr> </tbody> </table> </div> <div class="refsect1 examples" id="refsect1-function.shmop-size-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-4588"> <p><strong>Example #1 Getting the size of the shared memory block</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$shm_size </span><span style="color: #007700">= </span><span style="color: #0000BB">shmop_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$shm_id</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> <p class="para"> This example will put the size of shared memory block identified by <em>$shm_id</em> into <em>$shm_size</em>. </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.shmop-read.html">shmop_read</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.shmop-write.html">shmop_write</a></div> <div class="up"><a href="ref.shmop.html">Shared Memory Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>