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<h1 class="refname">pcntl_setpriority</h1>
<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pcntl_setpriority</span> — <span class="dc-title">Change the priority of any process</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.pcntl-setpriority-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>pcntl_setpriority</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$priority</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$pid</code><span class="initializer"> = getmypid()</span></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$process_identifier</code><span class="initializer"> = PRIO_PROCESS</span></span>
]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>pcntl_setpriority()</strong></span> sets the priority of
<code class="parameter">pid</code>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.pcntl-setpriority-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">priority</code></dt>
<dd>
<p class="para">
<code class="parameter">priority</code> is generally a value in the range
<em>-20</em> to <em>20</em>. The default priority
is <em>0</em> while a lower numerical value causes more
favorable scheduling. Because priority levels can differ between
system types and kernel versions, please see your system's setpriority(2)
man page for specific details.
</p>
</dd>
<dt>
<code class="parameter">pid</code></dt>
<dd>
<p class="para">
If not specified, the pid of the current process is used.
</p>
</dd>
<dt>
<code class="parameter">process_identifier</code></dt>
<dd>
<p class="para">
One of <strong><code>PRIO_PGRP</code></strong>, <strong><code>PRIO_USER</code></strong>
or <strong><code>PRIO_PROCESS</code></strong>.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.pcntl-setpriority-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.pcntl-setpriority-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.pcntl-getpriority.html" class="function" rel="rdfs-seeAlso">pcntl_getpriority()</a> - Get the priority of any process</span></li>
</ul>
</p>
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