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<!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>Set the effective GID of the current process</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.posix-setegid" class="refentry">
<div class="refnamediv">
<h1 class="refname">posix_setegid</h1>
<p class="verinfo">(PHP 4 &gt;= 4.0.2, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">posix_setegid</span> &mdash; <span class="dc-title">Set the effective GID of the current process</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.posix-setegid-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>posix_setegid</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$gid</code></span>
) : <span class="type">bool</span></div>
<p class="para rdfs-comment">
Set the effective group ID of the current process. This is a
privileged function and needs appropriate privileges (usually
root) on the system to be able to perform this function.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.posix-setegid-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">gid</code></dt>
<dd>
<p class="para">
The group id.
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.posix-setegid-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.posix-setegid-examples">
<h3 class="title">范例</h3>
<p class="para">
<div class="example" id="example-4351">
<p><strong>Example #1 <span class="function"><strong>posix_setegid()</strong></span> example</strong></p>
<div class="example-contents"><p>
This example will print out the effective group id, once changed.
</p></div>
<div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #DD0000">'My&nbsp;real&nbsp;group&nbsp;id&nbsp;is&nbsp;'</span><span style="color: #007700">.</span><span style="color: #0000BB">posix_getgid</span><span style="color: #007700">();&nbsp;</span><span style="color: #FF8000">//20<br /></span><span style="color: #0000BB">posix_setegid</span><span style="color: #007700">(</span><span style="color: #0000BB">40</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">'My&nbsp;real&nbsp;group&nbsp;id&nbsp;is&nbsp;'</span><span style="color: #007700">.</span><span style="color: #0000BB">posix_getgid</span><span style="color: #007700">();&nbsp;</span><span style="color: #FF8000">//20<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #DD0000">'My&nbsp;effective&nbsp;group&nbsp;id&nbsp;is&nbsp;'</span><span style="color: #007700">.</span><span style="color: #0000BB">posix_getegid</span><span style="color: #007700">();&nbsp;</span><span style="color: #FF8000">//40<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.posix-setegid-seealso">
<h3 class="title">参见</h3>
<p class="para">
<ul class="simplelist">
<li class="member">
<span class="function"><a href="posix_getgrgid.html" class="function" rel="rdfs-seeAlso">posix_getgrgid()</a> - Return info about a group by group id</span></li>
<li class="member"><span class="function"><a href="posix_getgid.html" class="function" rel="rdfs-seeAlso">posix_getgid()</a> - Return the real group ID of the current process</span></li>
<li class="member"><span class="function"><a href="posix_setgid.html" class="function" rel="rdfs-seeAlso">posix_setgid()</a> - Set the GID of the current process</span></li>
</ul>
</p>
</div>
</div></div></div></body></html>