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124 lines
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HTML
124 lines
6.3 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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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>以指定长度将一个值填充进数组</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-pad" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">array_pad</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">array_pad</span> — <span class="dc-title">
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以指定长度将一个值填充进数组
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.array-pad-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_pad</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"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value</code></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_pad()</strong></span> 返回
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<code class="parameter">array</code> 的一个拷贝，并用
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<code class="parameter">value</code> 将其填补到
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<code class="parameter">size</code> 指定的长度。如果
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<code class="parameter">size</code> 为正，则填补到数组的右侧，如果为负则从左侧开始填补。如果
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<code class="parameter">size</code> 的绝对值小于或等于
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<code class="parameter">array</code> 数组的长度则没有任何填补。有可能一次最多填补
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1048576 个单元。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.array-pad-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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需要被填充的原始数组。
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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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新数组的长度。
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</p>
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</dd>
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<dt>
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<code class="parameter">value</code></dt>
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<dd>
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<p class="para">
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将被填充的值，只有在 <code class="parameter">array</code> 的现有长度小于
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<code class="parameter">size</code> 的长度时才有效。
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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-pad-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 <code class="parameter">array</code> 用 <code class="parameter">value</code> 填充到 <code class="parameter">size</code> 指定的长度之后的一个副本。
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如果 <code class="parameter">size</code> 为正，则填补到数组的右侧，如果为负则从左侧开始填补。
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如果 <code class="parameter">size</code> 的绝对值小于或等于 <code class="parameter">array</code> 数组的长度则没有任何填补。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.array-pad-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-6054">
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<p><strong>Example #1 <span class="function"><strong>array_pad()</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 </span><span style="color: #007700">= array(</span><span style="color: #0000BB">12</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">9</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_pad</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// result is array(12, 10, 9, 0, 0)<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_pad</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, -</span><span style="color: #0000BB">7</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// result is array(-1, -1, -1, -1, 12, 10, 9)<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_pad</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #DD0000">"noop"</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// not padded<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.array-pad-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_fill.html" class="function" rel="rdfs-seeAlso">array_fill()</a> - 用给定的值填充数组</span></li>
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<li class="member"><span class="function"><a href="range.html" class="function" rel="rdfs-seeAlso">range()</a> - 根据范围创建数组，包含指定的元素</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> |