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fofolee
2019-04-28 19:00:34 +08:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>使字符串小写</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.mb-strtolower" class="refentry">
<div class="refnamediv">
<h1 class="refname">mb_strtolower</h1>
<p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_strtolower</span> &mdash; <span class="dc-title">使字符串小写</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mb-strtolower-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>mb_strtolower</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
] ) : <span class="type">string</span></div>
<p class="para rdfs-comment">
返回所有字母字符转换成小写的 <code class="parameter">str</code>
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mb-strtolower-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">str</code></dt>
<dd>
<p class="para">
要被小写的<span class="type"><span class="type 字符串">字符串</span></span>
</p>
</dd>
<dt>
<code class="parameter">encoding</code></dt>
<dd>
<p class="para"><code class="parameter">encoding</code>
参数为字符编码。如果省略,则使用内部字符编码。</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mb-strtolower-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
所有字母字符已被转换成小写的 <code class="parameter">str</code>
</p>
</div>
<div class="refsect1 unicode" id="refsect1-function.mb-strtolower-unicode">
<h3 class="title">Unicode</h3>
<p class="para">
更多关于 Unicode 属性的信息,请参见 <a href="http://www.unicode.org/unicode/reports/tr21/" class="link external">&raquo;&nbsp;http://www.unicode.org/unicode/reports/tr21/</a>
</p>
<p class="para">
<span class="function"><a href="strtolower.html" class="function">strtolower()</a></span> 不同的是,“字母”字符的检测是根据字符的 Unicode 属性。
因此函数的行为不会受语言设置的影响,能偶转换任意具有“字母”属性的字符,例如元音变音 AÄ
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mb-strtolower-examples">
<h3 class="title">范例</h3>
<p class="para">
<div class="example" id="example-3193">
<p><strong>Example #1 <span class="function"><strong>mb_strtolower()</strong></span> 例子</strong></p>
<div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"Mary&nbsp;Had&nbsp;A&nbsp;Little&nbsp;Lamb&nbsp;and&nbsp;She&nbsp;LOVED&nbsp;It&nbsp;So"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">$str</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;输出:&nbsp;mary&nbsp;had&nbsp;a&nbsp;little&nbsp;lamb&nbsp;and&nbsp;she&nbsp;loved&nbsp;it&nbsp;so<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
</div>
</div>
</p>
<p class="para">
<div class="example" id="example-3194">
<p><strong>Example #2 非拉丁 UTF-8 文本的 <span class="function"><strong>mb_strtolower()</strong></span> 例子</strong></p>
<div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"Τάχιστη&nbsp;αλώπηξ&nbsp;βαφής&nbsp;ψημένη&nbsp;γη,&nbsp;δρασκελίζει&nbsp;υπέρ&nbsp;νωθρού&nbsp;κυνός"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'UTF-8'</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">$str</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;输出&nbsp;τάχιστη&nbsp;αλώπηξ&nbsp;βαφής&nbsp;ψημένη&nbsp;γη,&nbsp;δρασκελίζει&nbsp;υπέρ&nbsp;νωθρού&nbsp;κυνός<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.mb-strtolower-seealso">
<h3 class="title">参见</h3>
<p class="para">
<ul class="simplelist">
<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>
<li class="member"><span class="function"><a href="mb_convert_case.html" class="function" rel="rdfs-seeAlso">mb_convert_case()</a> - 对字符串进行大小写转换</span></li>
<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>
</ul>
</p>
</div>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>使字符串小写</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.mb-strtolower" class="refentry">
<div class="refnamediv">
<h1 class="refname">mb_strtolower</h1>
<p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_strtolower</span> &mdash; <span class="dc-title">使字符串小写</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mb-strtolower-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>mb_strtolower</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
] ) : <span class="type">string</span></div>
<p class="para rdfs-comment">
返回所有字母字符转换成小写的 <code class="parameter">str</code>
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mb-strtolower-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">str</code></dt>
<dd>
<p class="para">
要被小写的<span class="type"><span class="type 字符串">字符串</span></span>
</p>
</dd>
<dt>
<code class="parameter">encoding</code></dt>
<dd>
<p class="para"><code class="parameter">encoding</code>
参数为字符编码。如果省略,则使用内部字符编码。</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mb-strtolower-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
所有字母字符已被转换成小写的 <code class="parameter">str</code>
</p>
</div>
<div class="refsect1 unicode" id="refsect1-function.mb-strtolower-unicode">
<h3 class="title">Unicode</h3>
<p class="para">
更多关于 Unicode 属性的信息,请参见 <a href="http://www.unicode.org/unicode/reports/tr21/" class="link external">&raquo;&nbsp;http://www.unicode.org/unicode/reports/tr21/</a>
</p>
<p class="para">
<span class="function"><a href="strtolower.html" class="function">strtolower()</a></span> 不同的是,“字母”字符的检测是根据字符的 Unicode 属性。
因此函数的行为不会受语言设置的影响,能偶转换任意具有“字母”属性的字符,例如元音变音 AÄ
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mb-strtolower-examples">
<h3 class="title">范例</h3>
<p class="para">
<div class="example" id="example-3193">
<p><strong>Example #1 <span class="function"><strong>mb_strtolower()</strong></span> 例子</strong></p>
<div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"Mary&nbsp;Had&nbsp;A&nbsp;Little&nbsp;Lamb&nbsp;and&nbsp;She&nbsp;LOVED&nbsp;It&nbsp;So"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">$str</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;输出:&nbsp;mary&nbsp;had&nbsp;a&nbsp;little&nbsp;lamb&nbsp;and&nbsp;she&nbsp;loved&nbsp;it&nbsp;so<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
</div>
</div>
</p>
<p class="para">
<div class="example" id="example-3194">
<p><strong>Example #2 非拉丁 UTF-8 文本的 <span class="function"><strong>mb_strtolower()</strong></span> 例子</strong></p>
<div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"Τάχιστη&nbsp;αλώπηξ&nbsp;βαφής&nbsp;ψημένη&nbsp;γη,&nbsp;δρασκελίζει&nbsp;υπέρ&nbsp;νωθρού&nbsp;κυνός"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'UTF-8'</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">$str</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;输出&nbsp;τάχιστη&nbsp;αλώπηξ&nbsp;βαφής&nbsp;ψημένη&nbsp;γη,&nbsp;δρασκελίζει&nbsp;υπέρ&nbsp;νωθρού&nbsp;κυνός<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.mb-strtolower-seealso">
<h3 class="title">参见</h3>
<p class="para">
<ul class="simplelist">
<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>
<li class="member"><span class="function"><a href="mb_convert_case.html" class="function" rel="rdfs-seeAlso">mb_convert_case()</a> - 对字符串进行大小写转换</span></li>
<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>
</ul>
</p>
</div>
</div></div></div></body></html>