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106 lines
4.1 KiB
HTML
106 lines
4.1 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>计算数组中所有值的乘积</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-product" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">array_product</h1>
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<p class="verinfo">(PHP 5 >= 5.1.0, PHP 7)</p><p class="refpurpose"><span class="refname">array_product</span> — <span class="dc-title">计算数组中所有值的乘积</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.array-product-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_product</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="type"><a href="language.pseudo-types.html#language.types.number" class="type number">number</a></span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>array_product()</strong></span> 以整数或浮点数返回一个数组中所有值的乘积。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.array-product-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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这个数组。
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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-product-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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以整数或浮点数返回一个数组中所有值的乘积。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.array-product-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.3.6</td>
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<td>
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空数组现在会产生 1，而之前此函数处理空数组会产生 0。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.array-product-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-6056">
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<p><strong>Example #1 <span class="function"><strong>array_product()</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 /><br />$a </span><span style="color: #007700">= array(</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">, </span><span style="color: #0000BB">6</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"product(a) = " </span><span style="color: #007700">. </span><span style="color: #0000BB">array_product</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"product(array()) = " </span><span style="color: #007700">. </span><span style="color: #0000BB">array_product</span><span style="color: #007700">(array()) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><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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product(a) = 384
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product(array()) = 1
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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></div></div></body></html> |