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<!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>延缓执行若干秒和纳秒</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.time-nanosleep" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">time_nanosleep</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">time_nanosleep</span> — <span class="dc-title">延缓执行若干秒和纳秒</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.time-nanosleep-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>time_nanosleep</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$seconds</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$nanoseconds</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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程序延缓执行指定数量的 <code class="parameter">seconds</code> 和 <code class="parameter">nanoseconds</code>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.time-nanosleep-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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必须是一个非负整数。
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</p>
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</dd>
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<dt>
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<code class="parameter">nanoseconds</code></dt>
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<dd>
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<p class="para">
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必须是一个小于1亿的非负整数。
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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.time-nanosleep-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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<p class="para">
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如果延迟被中断，一个关联数组会返回，内容为：
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<ul class="itemizedlist">
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<li class="listitem">
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<span class="simpara">
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<em>seconds</em> - 延迟剩余未执行的秒数
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</span>
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</li>
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<li class="listitem">
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<span class="simpara">
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<em>nanoseconds</em> - 延迟剩余未执行的纳秒数
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</span>
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</li>
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</ul>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.time-nanosleep-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>5.3.0</td>
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<td>
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至此之后该函数在Windows平台下可用。
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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.time-nanosleep-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-4550">
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<p><strong>Example #1 <span class="function"><strong>time_nanosleep()</strong></span> 的例子</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 /></span><span style="color: #FF8000">// Careful! This won't work as expected if an array is returned<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">time_nanosleep</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">500000000</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Slept for half a second.\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// This is better:<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">time_nanosleep</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">500000000</span><span style="color: #007700">) === </span><span style="color: #0000BB">true</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Slept for half a second.\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// And this is the best:<br /></span><span style="color: #0000BB">$nano </span><span style="color: #007700">= </span><span style="color: #0000BB">time_nanosleep</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">100000</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$nano </span><span style="color: #007700">=== </span><span style="color: #0000BB">true</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Slept for 2 seconds, 100 microseconds.\n"</span><span style="color: #007700">;<br />} elseif (</span><span style="color: #0000BB">$nano </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Sleeping failed.\n"</span><span style="color: #007700">;<br />} elseif (</span><span style="color: #0000BB">is_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$nano</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$seconds </span><span style="color: #007700">= </span><span style="color: #0000BB">$nano</span><span style="color: #007700">[</span><span style="color: #DD0000">'seconds'</span><span style="color: #007700">];<br /> </span><span style="color: #0000BB">$nanoseconds </span><span style="color: #007700">= </span><span style="color: #0000BB">$nano</span><span style="color: #007700">[</span><span style="color: #DD0000">'nanoseconds'</span><span style="color: #007700">];<br /> echo </span><span style="color: #DD0000">"Interrupted by a signal.\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"Time remaining: </span><span style="color: #0000BB">$seconds</span><span style="color: #DD0000"> seconds, </span><span style="color: #0000BB">$nanoseconds</span><span style="color: #DD0000"> nanoseconds."</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>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.time-nanosleep-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="usleep.html" class="function" rel="rdfs-seeAlso">usleep()</a> - 以指定的微秒数延迟执行</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> |