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100 lines
3.8 KiB
HTML
100 lines
3.8 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>Get the system's high resolution time</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.hrtime" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">hrtime</h1>
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<p class="verinfo">(PHP 7 >= 7.3.0)</p><p class="refpurpose"><span class="refname">hrtime</span> — <span class="dc-title">Get the system's high resolution time</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.hrtime-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>hrtime</strong></span>
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([ <span class="methodparam"><span class="type">bool</span> <code class="parameter">$get_as_number</code><span class="initializer"> = <strong><code>FALSE</code></strong></span></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="simpara">
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Returns the system's high resolution time, counted from an arbitrary point in time.
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The delivered timestamp is monotonic and can not be adjusted.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.hrtime-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">get_as_number</code></dt>
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<dd>
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<p class="para">
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Whether the high resolution time should be returned as <span class="type"><a href="language.types.array.html" class="type array">array</a></span>
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or number.
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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.hrtime-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns an array of integers in the form [seconds, nanoseconds], if the
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parameter <code class="parameter">get_as_number</code> is false. Otherwise the nanoseconds
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are returned as <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> (64bit platforms) or <span class="type"><a href="language.types.float.html" class="type float">float</a></span>
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(32bit platforms).
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.hrtime-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-4541">
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<p><strong>Example #1 <span class="function"><strong>hrtime()</strong></span> usage</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: #007700">echo </span><span style="color: #0000BB">hrtime</span><span style="color: #007700">(</span><span style="color: #0000BB">true</span><span style="color: #007700">), </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">hrtime</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>以上例程的输出类似于：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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10444739687370679
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Array
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(
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[0] => 10444739
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[1] => 687464812
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)
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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.hrtime-seealso">
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<h3 class="title">参见</h3>
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<ul class="simplelist">
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<li class="member">The <a href="book.hrtime.html" class="link">High resolution timing</a> extension</li>
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</ul>
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</div>
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</div></div></div></body></html> |