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104 lines
3.8 KiB
HTML
104 lines
3.8 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>二进制安全比较字符串开头的若干个字符（不区分大小写）</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.strncasecmp" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">strncasecmp</h1>
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<p class="verinfo">(PHP 4 >= 4.0.2, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">strncasecmp</span> — <span class="dc-title">二进制安全比较字符串开头的若干个字符（不区分大小写）</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.strncasecmp-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>strncasecmp</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str1</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$str2</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$len</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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该函数与 <span class="function"><a href="strcasecmp.html" class="function">strcasecmp()</a></span> 类似，不同之处在于你可以指定两个字符串比较时使用的长度（即最大比较长度）。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.strncasecmp-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">str1</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">str2</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">len</code></dt>
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<dd>
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<p class="para">
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最大比较长度。
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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.strncasecmp-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果 <code class="parameter">str1</code> 小于
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<code class="parameter">str2</code> 返回 < 0；
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如果 <code class="parameter">str1</code>
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大于 <code class="parameter">str2</code>
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返回 > 0；如果两者相等，返回 0。
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.strncasecmp-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="strncmp.html" class="function" rel="rdfs-seeAlso">strncmp()</a> - 二进制安全比较字符串开头的若干个字符</span></li>
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<li class="member"><span class="function"><a href="preg_match.html" class="function" rel="rdfs-seeAlso">preg_match()</a> - 执行匹配正则表达式</span></li>
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<li class="member"><span class="function"><a href="substr_compare.html" class="function" rel="rdfs-seeAlso">substr_compare()</a> - 二进制安全比较字符串（从偏移位置比较指定长度）</span></li>
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<li class="member"><span class="function"><a href="strcasecmp.html" class="function" rel="rdfs-seeAlso">strcasecmp()</a> - 二进制安全比较字符串（不区分大小写）</span></li>
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<li class="member"><span class="function"><a href="stristr.html" class="function" rel="rdfs-seeAlso">stristr()</a> - strstr 函数的忽略大小写版本</span></li>
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<li class="member"><span class="function"><a href="substr.html" class="function" rel="rdfs-seeAlso">substr()</a> - 返回字符串的子串</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> |