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    2 => '判断给定文件名是否可执行',
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?>
<div id="function.is-executable" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">is_executable</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">is_executable</span> &mdash; <span class="dc-title">判断给定文件名是否可执行</span></p>

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

  <p class="para rdfs-comment">
   判断给定文件名是否可执行。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.is-executable-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">filename</code></dt>
     <dd>
      <p class="para">
       文件的路径。
      </p>
     </dd>
    
   </dl>
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.is-executable-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   如果文件存在且可执行则返回 <strong><code><a href="reserved.constants.php#constant.true">true</a></code></strong>，错误时返回 <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong>。在 POSIX
   系统中，如果设置了文件权限的可执行位，则文件可执行。对于 Windows，请参阅下面的注释。
  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-function.is-executable-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
失败时抛出 <strong><code><a href="errorfunc.constants.php#constant.e-warning">E_WARNING</a></code></strong> 警告。
</p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.is-executable-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>is_executable()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /><br />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">'/home/vincent/somefile.sh'</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">is_executable</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">)) {<br />    echo </span><span style="color: #0000BB">$file</span><span style="color: #007700">.</span><span style="color: #DD0000">' is executable'</span><span style="color: #007700">;<br />} else {<br />    echo </span><span style="color: #0000BB">$file</span><span style="color: #007700">.</span><span style="color: #DD0000">' is not executable'</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.is-executable-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">注意</strong>: <span class="simpara">此函数的结果会被缓存。参见
<span class="function"><a href="function.clearstatcache.php" class="function">clearstatcache()</a></span> 以获得更多细节。</span></p></blockquote>
  <div class="tip"><strong class="tip">小技巧</strong><p class="simpara">自 PHP 5.0.0 起, 此函数也用于<em>某些</em>
URL 包装器。请参见 <a href="wrappers.php" class="xref">支持的协议和封装协议</a>以获得支持 <span class="function"><a href="function.stat.php" class="function">stat()</a></span> 系列函数功能的包装器列表。</p></div>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <span class="simpara">
    在 Windows 上，如果文件是 Win API <code class="literal">GetBinaryType()</code>
    报告的正确可执行文件，则该文件视为可执行文件；由于 BC 原因，扩展名是
    <var class="filename">.bat</var> 或 <var class="filename">.cmd</var>
    的文件也被视为可执行文件。在 PHP 7.4.0 之前，任何扩展名是
    <var class="filename">.bat</var> 或 <var class="filename">.cmd</var>
    的非空文件都被视为可执行文件。注意 <var class="envar">PATHEXT</var> 与
    <span class="function"><strong>is_executable()</strong></span> 无关。
   </span>
  </p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.is-executable-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.is-file.php" class="function" rel="rdfs-seeAlso">is_file()</a> - 判断给定文件名是否为一个正常的文件</span></li>
    <li><span class="function"><a href="function.is-link.php" class="function" rel="rdfs-seeAlso">is_link()</a> - 判断给定文件名是否为一个符号连接</span></li>
   </ul>
  </p>
 </div>

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