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116 lines
4.8 KiB
HTML
116 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>Tests if a bit is set</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.gmp-testbit" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">gmp_testbit</h1>
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<p class="verinfo">(PHP 5 >= 5.3.0, PHP 7)</p><p class="refpurpose"><span class="refname">gmp_testbit</span> — <span class="dc-title">Tests if a bit is set</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.gmp-testbit-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>gmp_testbit</strong></span>
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( <span class="methodparam"><span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span> <code class="parameter">$a</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$index</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Tests if the specified bit is set.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.gmp-testbit-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">a</code></dt>
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<dd>
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<p class="para">可以是一个 GMP
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数据 <span class="type"><span class="type resouce">resouce</span></span>，或一个可以转换为数值的字符串。</p>
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</dd>
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<dt>
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<code class="parameter">index</code></dt>
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<dd>
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<p class="para">
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The bit to test
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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.gmp-testbit-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns <strong><code>TRUE</code></strong> if the bit is set in resource <code class="parameter">$a</code>,
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otherwise <strong><code>FALSE</code></strong>.
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</p>
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</div>
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<div class="refsect1 errors" id="refsect1-function.gmp-testbit-errors">
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<h3 class="title">错误／异常</h3>
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<p class="para">
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An <strong><code>E_WARNING</code></strong> level error is issued when
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<code class="parameter">index</code> is less than zero, and <strong><code>FALSE</code></strong>
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is returned.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.gmp-testbit-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-4107">
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<p><strong>Example #1 <span class="function"><strong>gmp_testbit()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$n </span><span style="color: #007700">= </span><span style="color: #0000BB">gmp_init</span><span style="color: #007700">(</span><span style="color: #DD0000">"1000000"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">gmp_testbit</span><span style="color: #007700">(</span><span style="color: #0000BB">$n</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">gmp_setbit</span><span style="color: #007700">(</span><span style="color: #0000BB">$n</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">gmp_testbit</span><span style="color: #007700">(</span><span style="color: #0000BB">$n</span><span style="color: #007700">, </span><span style="color: #0000BB">1</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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bool(false)
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bool(true)
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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.gmp-testbit-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="gmp_setbit.html" class="function" rel="rdfs-seeAlso">gmp_setbit()</a> - Set bit</span></li>
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<li class="member"><span class="function"><a href="gmp_clrbit.html" class="function" rel="rdfs-seeAlso">gmp_clrbit()</a> - Clear bit</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> |