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<title>Get size of shared memory block</title>
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<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>
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