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<title>Tells whether the stream supports locking.</title>
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<h1 class="refname">stream_supports_lock</h1>
<p class="verinfo">(PHP 5 >= 5.3.0)</p><p class="refpurpose"><span class="refname">stream_supports_lock</span> — <span class="dc-title">Tells whether the stream supports locking.</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.stream-supports-lock-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>stream_supports_lock</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stream</code></span>
)</div>
<p class="para rdfs-comment">
Tells whether the stream supports locking through
<span class="function"><a href="function.flock.html" class="function">flock()</a></span>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.stream-supports-lock-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">stream</code></em></span>
<dd>
<p class="para">
The stream to check.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.stream-supports-lock-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.stream-supports-lock-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.flock.html" class="function" rel="rdfs-seeAlso">flock()</a> - Portable advisory file locking</span></li>
</ul>
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