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81 lines
3.0 KiB
HTML
81 lines
3.0 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>Returns the absolute value of a variant</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.variant-abs" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">variant_abs</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">variant_abs</span> — <span class="dc-title">Returns the absolute value of a variant</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.variant-abs-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>variant_abs</strong></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">$val</code></span>
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) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
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<p class="para rdfs-comment">
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Returns the absolute value of a variant.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.variant-abs-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">val</code></dt>
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<dd>
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<p class="para">
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The variant.
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</p>
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</dd>
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</dl>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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对于所有变量运算函数，本函数的参数可以是 PHP
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内置的类型（整数，字符串，浮点数，布尔型或者
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<strong><code>NULL</code></strong>），或者是一个 COM，VARIANT 或者 DOTNET 类的实例。PHP
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内置类型将会使用和构造<a href="class.variant.html" class="xref">VARIANT</a>类相同的规则转换成变量。COM 和 DOTNET
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对象的值将会取其默认属性并被当成变量值使用。
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</p>
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<p class="para">
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变量运算函数是同名函数在 COM
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库中的外包；有关此类函数的更多信息参见 MSDN
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库。PHP 函数命名有少许区别，例如 PHP
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中的 <span class="function"><a href="variant_add.html" class="function">variant_add()</a></span> 对应于
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MSDN 文档中的 <em>VarAdd()</em>。
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</p>
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</p></blockquote>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.variant-abs-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns the absolute value of <code class="parameter">val</code>.
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.variant-abs-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="abs.html" class="function" rel="rdfs-seeAlso">abs()</a> - 绝对值</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> |