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    2 => '对字符串执行 ROT13 转换',
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?>
<div id="function.str-rot13" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">str_rot13</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">str_rot13</span> &mdash; <span class="dc-title">对字符串执行 ROT13 转换</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.str-rot13-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>str_rot13</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$string</code></span>): <span class="type"><a href="language.types.string.php" class="type string">string</a></span></div>

  <p class="para rdfs-comment">
   对 <code class="parameter">string</code> 参数执行 ROT13 编码并将结果字符串返回。
  </p>
  <p class="para">
   ROT13 编码简单地使用字母表中后面第 13 个字母替换当前字母，同时忽略非字母表中的字符。编码和解码都使用相同的函数，传递一个编码过的字符串作为参数，将得到原始字符串。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.str-rot13-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">string</code></dt>
     <dd>
      <p class="para">
       输入字符串。
      </p>
     </dd>
    
   </dl>
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.str-rot13-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回给定字符串的 ROT13 版本。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.str-rot13-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>str_rot13()</strong></span> 示例</strong></p>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">str_rot13</span><span style="color: #007700">(</span><span style="color: #DD0000">'PHP 4.3.0'</span><span style="color: #007700">); </span><span style="color: #FF8000">// CUC 4.3.0<br /><br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

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


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