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96 lines
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HTML
96 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>以指定的微秒数延迟执行</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.usleep" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">usleep</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">usleep</span> — <span class="dc-title">以指定的微秒数延迟执行</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.usleep-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>usleep</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$micro_seconds</code></span>
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) : <span class="type"><span class="type void">void</span></span></div>
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<p class="para rdfs-comment">
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以指定的微秒数延缓程序的执行。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.usleep-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">micro_seconds</code></dt>
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<dd>
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<p class="para">
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暂停的时间以微秒计。1微秒（micro second）是百万分之一秒。
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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.usleep-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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没有返回值。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.usleep-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-4556">
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<p><strong>Example #1 <span class="function"><strong>usleep()</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 /></span><span style="color: #FF8000">// Current time<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'h:i:s'</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// wait for 2 seconds<br /></span><span style="color: #0000BB">usleep</span><span style="color: #007700">(</span><span style="color: #0000BB">2000000</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// back!<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'h:i:s'</span><span style="color: #007700">) . </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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11:13:28
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11:13:30
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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.usleep-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="sleep.html" class="function" rel="rdfs-seeAlso">sleep()</a> - 延缓执行</span></li>
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<li class="member"><span class="function"><a href="time_nanosleep.html" class="function" rel="rdfs-seeAlso">time_nanosleep()</a> - 延缓执行若干秒和纳秒</span></li>
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<li class="member"><span class="function"><a href="time_sleep_until.html" class="function" rel="rdfs-seeAlso">time_sleep_until()</a> - 使脚本睡眠到指定的时间为止。</span></li>
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<li class="member"><span class="function"><a href="set_time_limit.html" class="function" rel="rdfs-seeAlso">set_time_limit()</a> - 设置脚本最大执行时间</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> |