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144 lines
9.0 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>对字符串进行大小写转换</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.mb-convert-case" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mb_convert_case</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_convert_case</span> — <span class="dc-title">对字符串进行大小写转换</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mb-convert-case-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>mb_convert_case</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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对一个 <span class="type"><a href="language.types.string.html" class="type string">string</a></span> 进行大小写转换，转换模式由 <code class="parameter">mode</code> 指定。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mb-convert-case-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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要被转换的 <span class="type"><a href="language.types.string.html" class="type string">string</a></span>。
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</p>
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</dd>
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<dt>
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<code class="parameter">mode</code></dt>
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<dd>
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<p class="para">
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转换的模式。它可以是
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<strong><code>MB_CASE_UPPER</code></strong>、
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<strong><code>MB_CASE_LOWER</code></strong> 和
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<strong><code>MB_CASE_TITLE</code></strong> 的其中一个。
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</p>
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</dd>
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<dt>
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<code class="parameter">encoding</code></dt>
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<dd>
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<p class="para"><code class="parameter">encoding</code>
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参数为字符编码。如果省略，则使用内部字符编码。</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.mb-convert-case-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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按 <code class="parameter">mode</code> 指定的模式转换 <code class="parameter">string</code> 大小写后的版本。
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</p>
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</div>
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<div class="refsect1 unicode" id="refsect1-function.mb-convert-case-unicode">
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<h3 class="title">Unicode</h3>
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<p class="para">
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和类似 <span class="function"><a href="strtolower.html" class="function">strtolower()</a></span>、<span class="function"><a href="strtoupper.html" class="function">strtoupper()</a></span> 的标准大小写转换函数相比，
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大小写转换的执行根据 Unicode 字符属性的基础。
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因此此函数的行为不受语言环境（locale）设置的影响，能够转换任意具有“字母”属性的字符，例如元音变音A（Ä）。
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</p>
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<p class="para">
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更多关于 Unicode 属性的信息，请查看 <a href="http://www.unicode.org/unicode/reports/tr21/" class="link external">» http://www.unicode.org/unicode/reports/tr21/</a>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mb-convert-case-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-3172">
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<p><strong>Example #1 <span class="function"><strong>mb_convert_case()</strong></span> 例子</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">"mary had a Little lamb and she loved it so"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_convert_case</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">MB_CASE_UPPER</span><span style="color: #007700">, </span><span style="color: #DD0000">"UTF-8"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// 输出 MARY HAD A LITTLE LAMB AND SHE LOVED IT SO<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_convert_case</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">MB_CASE_TITLE</span><span style="color: #007700">, </span><span style="color: #DD0000">"UTF-8"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// 输出 Mary Had A Little Lamb And She Loved It So<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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<p class="para">
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<div class="example" id="example-3173">
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<p><strong>Example #2 非拉丁 UTF-8 文本的<span class="function"><strong>mb_convert_case()</strong></span> 例子</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 />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_convert_case</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">MB_CASE_UPPER</span><span style="color: #007700">, </span><span style="color: #DD0000">"UTF-8"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// 输出 ΤΆΧΙΣΤΗ ΑΛΏΠΗΞ ΒΑΦΉΣ ΨΗΜΈΝΗ ΓΗ, ΔΡΑΣΚΕΛΊΖΕΙ ΥΠΈΡ ΝΩΘΡΟΎ ΚΥΝΌΣ<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_convert_case</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">MB_CASE_TITLE</span><span style="color: #007700">, </span><span style="color: #DD0000">"UTF-8"</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// 输出 Τάχιστη Αλώπηξ Βαφήσ Ψημένη Γη, Δρασκελίζει Υπέρ Νωθρού Κυνόσ<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.mb-convert-case-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="mb_strtolower.html" class="function" rel="rdfs-seeAlso">mb_strtolower()</a> - 使字符串小写</span></li>
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<li class="member"><span class="function"><a href="mb_strtoupper.html" class="function" rel="rdfs-seeAlso">mb_strtoupper()</a> - 使字符串大写</span></li>
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<li class="member"><span class="function"><a href="strtolower.html" class="function" rel="rdfs-seeAlso">strtolower()</a> - 将字符串转化为小写</span></li>
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<li class="member"><span class="function"><a href="strtoupper.html" class="function" rel="rdfs-seeAlso">strtoupper()</a> - 将字符串转化为大写</span></li>
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<li class="member"><span class="function"><a href="ucfirst.html" class="function" rel="rdfs-seeAlso">ucfirst()</a> - 将字符串的首字母转换为大写</span></li>
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<li class="member"><span class="function"><a href="ucwords.html" class="function" rel="rdfs-seeAlso">ucwords()</a> - 将字符串中每个单词的首字母转换为大写</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> |