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171 lines
5.7 KiB
HTML
171 lines
5.7 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>将一个数组分割成多个</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-chunk" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">array_chunk</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_chunk</span> — <span class="dc-title">将一个数组分割成多个</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.array-chunk-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_chunk</strong></span>
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( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$size</code></span>
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[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$preserve_keys</code><span class="initializer"> = false</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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将一个数组分割成多个数组，其中每个数组的单元数目由
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<code class="parameter">size</code> 决定。最后一个数组的单元数目可能会少于 <code class="parameter">size</code> 个。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.array-chunk-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">size</code></dt>
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<dd>
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<p class="para">
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每个数组的单元数目
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</p>
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</dd>
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<dt>
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<code class="parameter">preserve_keys</code></dt>
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<dd>
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<p class="para">
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设为 <strong><code>TRUE</code></strong>，可以使 PHP
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保留输入数组中原来的键名。如果你指定了 <strong><code>FALSE</code></strong>，那每个结果数组将用从零开始的新数字索引。默认值是 <strong><code>FALSE</code></strong>。
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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-chunk-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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得到的数组是一个多维数组中的单元，其索引从零开始，每一维包含了 <code class="parameter">size</code> 个元素。
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</p>
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</div>
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<div class="refsect1 errors" id="refsect1-function.array-chunk-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 <code class="parameter">size</code> 小于 1，会抛出一个
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<strong><code>E_WARNING</code></strong> 错误并返回 <strong><code>NULL</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.array-chunk-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-6012">
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<p><strong>Example #1 <span class="function"><strong>array_chunk()</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 />$input_array </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'a'</span><span style="color: #007700">, </span><span style="color: #DD0000">'b'</span><span style="color: #007700">, </span><span style="color: #DD0000">'c'</span><span style="color: #007700">, </span><span style="color: #DD0000">'d'</span><span style="color: #007700">, </span><span style="color: #DD0000">'e'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_chunk</span><span style="color: #007700">(</span><span style="color: #0000BB">$input_array</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_chunk</span><span style="color: #007700">(</span><span style="color: #0000BB">$input_array</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">true</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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[0] => Array
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(
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[0] => a
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[1] => b
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)
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[1] => Array
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(
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[0] => c
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[1] => d
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)
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[2] => Array
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(
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[0] => e
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)
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)
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Array
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(
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[0] => Array
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(
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[0] => a
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[1] => b
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)
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[1] => Array
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(
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[2] => c
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[3] => d
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)
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[2] => Array
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(
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[4] => e
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)
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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 seealso" id="refsect1-function.array-chunk-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="array_slice.html" class="function" rel="rdfs-seeAlso">array_slice()</a> - 从数组中取出一段</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> |