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117 lines
4.4 KiB
HTML
117 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>随机打乱一个字符串</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.str-shuffle" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">str_shuffle</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">str_shuffle</span> — <span class="dc-title">随机打乱一个字符串</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.str-shuffle-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>str_shuffle</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
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) : <span class="type">string</span></div>
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<p class="simpara">
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<span class="function"><strong>str_shuffle()</strong></span> 函数打乱一个字符串，使用任何一种可能的排序方案。
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</p>
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<div class="caution"><strong class="caution">Caution</strong><p class="para">本函数并不会生成安全加密的值，不应用于加密用途。若需要安全加密的值，考虑使用<span class="function"><a href="openssl_random_pseudo_bytes.html" class="function">openssl_random_pseudo_bytes()</a></span>。</p></div>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.str-shuffle-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">str</code></dt>
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<dd>
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<p class="para">
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输入字符串。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.str-shuffle-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回打乱后的字符串。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.str-shuffle-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>7.1.0</td>
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<td>
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<a href="migration71.incompatible.html#migration71.incompatible.rand_srand_aliases" class="link">内置的随机算法从 libc rand 函数改成了<a href="http://www.math.sci.hiroshima_u.ac.jp/~m_mat/MT/emt.html" class="link external">» 梅森旋转演</a>伪随机数发生算法。</a>
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.str-shuffle-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-5959">
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<p><strong>Example #1 <span class="function"><strong>str_shuffle()</strong></span> 范例</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'abcdef'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$shuffled </span><span style="color: #007700">= </span><span style="color: #0000BB">str_shuffle</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 输出类似于: bfdaec<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$shuffled</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.str-shuffle-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="shuffle.html" class="function" rel="rdfs-seeAlso">shuffle()</a> - 打乱数组</span></li>
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<li class="member"><span class="function"><a href="rand.html" class="function" rel="rdfs-seeAlso">rand()</a> - 产生一个随机整数</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |