Source of: /manual/en/function.pcntl-setpriority.php
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<div id="function.pcntl-setpriority" class="refentry">
<div class="refnamediv">
<h1 class="refname">pcntl_setpriority</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">pcntl_setpriority</span> — <span class="dc-title">Change the priority of any process</span></p>
</div>
<a name="function.pcntl-setpriority.description"></a><div class="refsect1 description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><b>pcntl_setpriority</b></span>
( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$priority</tt></span>
[, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$pid</tt><span class="initializer"> = getmypid()</span></span>
[, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$process_identifier</tt><span class="initializer"> = PRIO_PROCESS</span></span>
]] )</div>
<p class="para rdfs-comment">
<b>pcntl_setpriority()</b> sets the priority of
<i><tt class="parameter">pid</tt></i>
.
</p>
</div>
<a name="function.pcntl-setpriority.parameters"></a><div class="refsect1 parameters">
<h3 class="title">Parameters</h3>
<p class="para">
</p><dl>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">priority</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
<i><tt class="parameter">priority</tt></i>
is generally a value in the range
<i>-20</i> to <i>20</i>. The default priority
is <i>0</i> 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 class="varlistentry">
<span class="term"><i><tt class="parameter">pid</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
If not specified, the pid of the current process is used.
</p>
</dd>
<dt class="varlistentry">
<span class="term"><i><tt class="parameter">process_identifier</tt></i>
</span>
</dt><dd class="listitem">
<p class="para">
One of <b><tt class="constant">PRIO_PGRP</tt></b>, <b><tt class="constant">PRIO_USER</tt></b>
or <b><tt class="constant">PRIO_PROCESS</tt></b>.
</p>
</dd>
</dl>
<p>
</p>
</div>
<a name="function.pcntl-setpriority.returnvalues"></a><div class="refsect1 returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <b><tt class="constant">TRUE</tt></b> on success or <b><tt class="constant">FALSE</tt></b> on failure.
</p>
</div>
<a name="function.pcntl-setpriority.seealso"></a><div class="refsect1 seealso">
<h3 class="title">See Also</h3>
<p class="para">
</p><ul class="simplelist">
<li class="member"><a href="function.pcntl-getpriority.php" class="function" rel="rdfs-seeAlso">pcntl_getpriority()</a> - Get the priority of any process</li>
</ul><p>
</p>
</div>
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