<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$TOC_DEPRECATED = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/ref.dir.inc";
$setup = array (
  'home' => 
  array (
    0 => 'index.php',
    1 => 'PHP Manual',
  ),
  'head' => 
  array (
    0 => 'UTF-8',
    1 => 'zh',
  ),
  'this' => 
  array (
    0 => 'function.chroot.php',
    1 => 'chroot',
    2 => '改变根目录',
  ),
  'up' => 
  array (
    0 => 'ref.dir.php',
    1 => '目录函数函数',
  ),
  'prev' => 
  array (
    0 => 'function.chdir.php',
    1 => 'chdir',
  ),
  'next' => 
  array (
    0 => 'function.closedir.php',
    1 => 'closedir',
  ),
  'alternatives' => 
  array (
  ),
  'source' => 
  array (
    'lang' => 'zh',
    'path' => 'reference/dir/functions/chroot.xml',
  ),
  'history' => 
  array (
  ),
);
$setup["toc"] = $TOC;
$setup["toc_deprecated"] = $TOC_DEPRECATED;
$setup["parents"] = $PARENTS;
manual_setup($setup);

contributors($setup);

?>
<div id="function.chroot" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">chroot</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.5, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">chroot</span> &mdash; <span class="dc-title">改变根目录</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.chroot-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>chroot</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$directory</code></span>): <span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span></div>

  <p class="para rdfs-comment">
   将当前进程的根目录改变为
   <code class="parameter">directory</code>。
  </p>
  <p class="para">
   本函数仅在系统支持且运行于 CLI，CGI
   或嵌入 SAPI 版本时才能正确工作。此外本函数还需要 root 权限。
  </p>
  <p class="para">
   调用此函数不会改变 <code class="literal">__DIR__</code> 和 <code class="literal">__FILE__</code> 魔术常量的值。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.chroot-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">directory</code></dt>
     <dd>
      <p class="para">
       新目录
      </p>
     </dd>
    
   </dl>
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.chroot-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code><a href="reserved.constants.php#constant.true">true</a></code></strong>， 或者在失败时返回 <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.chroot-examples">
  <h3 class="title">示例</h3>
  <p class="para">
   <div class="example" id="example-1"><p><strong>示例 #1 <span class="function"><strong>chroot()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />chroot</span><span style="color: #007700">(</span><span style="color: #DD0000">"/path/to/your/chroot/"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">getcwd</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

    <div class="example-contents"><p>以上示例会输出：</p></div>
    <div class="example-contents screen">
<div class="examplescode"><pre class="examplescode">/</pre>
</div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.chroot-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">注意</strong>: <span class="simpara">此函数未在 Windows 平台下实现。</span></p></blockquote>
  <blockquote class="note"><p><strong class="note">注意</strong>: <span class="simpara">此函数未在 ZTS (Zend Thread Safety) PHP
解释器中实现。确认你的 PHP 版本，可以在命令行输入 <strong class="command">php -i</strong> 来查看是否包含 <strong><code><a href="reserved.constants.php#constant.php-zts">PHP_ZTS</a></code></strong> 常量。</span></p></blockquote>
 </div>

</div><?php manual_footer($setup); ?>