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121 lines
4.8 KiB
HTML
121 lines
4.8 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>将数组中的所有键名修改为全大写或小写</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.array-change-key-case" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">array_change_key_case</h1>
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<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">array_change_key_case</span> — <span class="dc-title">将数组中的所有键名修改为全大写或小写</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.array-change-key-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>array_change_key_case</strong></span>
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( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$case</code><span class="initializer"> = CASE_LOWER</span></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>array_change_key_case()</strong></span> 将 <code class="parameter">array</code>
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数组中的所有键名改为全小写或大写。本函数不改变数字索引。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.array-change-key-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">array</code></dt>
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<dd>
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<p class="para">
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需要操作的数组。
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</p>
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</dd>
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<dt>
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<code class="parameter">case</code></dt>
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<dd>
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<p class="para">
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可以在这里用两个常量，<strong><code>CASE_UPPER</code></strong> 或
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<strong><code>CASE_LOWER</code></strong>（默认值）。
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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.array-change-key-case-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回一个键全是小写或者全是大写的数组；如果输入值（<code class="parameter">array</code>）不是一个数组，那么返回<strong><code>FALSE</code></strong>
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</p>
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</div>
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<div class="refsect1 errors" id="refsect1-function.array-change-key-case-errors">
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<h3 class="title">错误／异常</h3>
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<p class="para">
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如果输入值（<code class="parameter">array</code>）不是一个数组，就会抛出一个错误警告（<strong><code>E_WARNING</code></strong>）。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.array-change-key-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-6011">
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<p><strong>Example #1 <span class="function"><strong>array_change_key_case()</strong></span>例一</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 />$input_array </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"FirSt" </span><span style="color: #007700">=> </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #DD0000">"SecOnd" </span><span style="color: #007700">=> </span><span style="color: #0000BB">4</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_change_key_case</span><span style="color: #007700">(</span><span style="color: #0000BB">$input_array</span><span style="color: #007700">, </span><span style="color: #0000BB">CASE_UPPER</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 class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Array
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(
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[FIRST] => 1
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[SECOND] => 4
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)
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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 notes" id="refsect1-function.array-change-key-case-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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如果一个数组中的多个键名经过本函数后变成一样的话（例如
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"<em>keY</em>" 和 "<em>kEY</em>"），最后一个值将覆盖其它的值。
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</p>
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</p></blockquote>
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</div>
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</div></div></div></body></html> |