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61 lines
2.1 KiB
HTML
61 lines
2.1 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>为进程设置一个alarm闹钟信号</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.pcntl-alarm" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pcntl_alarm</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pcntl_alarm</span> — <span class="dc-title">为进程设置一个alarm闹钟信号</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pcntl-alarm-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>pcntl_alarm</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$seconds</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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创建一个计时器，在指定的秒数后向进程发送一个<strong><code>SIGALRM</code></strong>信号。每次对
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<span class="function"><strong>pcntl_alarm()</strong></span>的调用都会取消之前设置的alarm信号。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pcntl-alarm-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">seconds</code></dt>
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<dd>
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<p class="para">
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等待的秒数。如果<code class="parameter">seconds</code>设置为0,将不会创建alarm信号。
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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.pcntl-alarm-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回上次alarm调度（离alarm信号发送）剩余的秒数，或者之前没有alarm调度（译注：或者之前调度已完成）
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时返回<em>0</em>。
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</p>
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</div>
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</div></div></div></body></html> |