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96 lines
3.2 KiB
HTML
96 lines
3.2 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>计算两个字符串的相似度</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.similar-text" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">similar_text</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">similar_text</span> — <span class="dc-title">计算两个字符串的相似度</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.similar-text-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>similar_text</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$first</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$second</code></span>
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[, <span class="methodparam"><span class="type">float</span> <code class="parameter reference">&$percent</code></span>
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] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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两个字符串的相似程度计算依据 Programming Classics: Implementing the World's Best Algorithms by Oliver (ISBN 0-131-00413-1) 的描述进行。注意该实现没有使用 Oliver 虚拟码中的堆栈，但是却进行了递归调用，这个做法可能会导致整个过程变慢或变快。也请注意，该算法的复杂度是 O(N**3)，N 是最长字符串的长度。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.similar-text-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">first</code></dt>
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<dd>
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<p class="para">
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第一个字符串。
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</p>
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</dd>
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<dt>
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<code class="parameter">second</code></dt>
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<dd>
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<p class="para">
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第二个字符串。
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</p>
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</dd>
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<dt>
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<code class="parameter">percent</code></dt>
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<dd>
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<p class="para">
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通过引用方式传递第三个参数，<span class="function"><strong>similar_text()</strong></span> 将计算相似程度百分数。
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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.similar-text-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回在两个字符串中匹配字符的数目。
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.similar-text-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="levenshtein.html" class="function" rel="rdfs-seeAlso">levenshtein()</a> - 计算两个字符串之间的编辑距离</span></li>
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<li class="member"><span class="function"><a href="soundex.html" class="function" rel="rdfs-seeAlso">soundex()</a> - Calculate the soundex key of a string</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> |