<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Get the system's high resolution time</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.highlight-string.html">highlight_string</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.ignore-user-abort.html">ignore_user_abort</a></div> <div class="up"><a href="ref.misc.html">Misc. Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.hrtime" class="refentry"> <div class="refnamediv"> <h1 class="refname">hrtime</h1> <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> </div> <div class="refsect1 description" id="refsect1-function.hrtime-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>hrtime</strong></span> ([ <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> ] )</div> <p class="simpara"> Returns the system's high resolution time, counted from an arbitrary point in time. The delivered timestamp is monotonic and can not be adjusted. </p> </div> <div class="refsect1 parameters" id="refsect1-function.hrtime-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <code class="parameter">get_as_number</code></dt> <dd> <p class="para"> Whether the high resolution time should be returned as <span class="type"><a href="language.types.array.html" class="type array">array</a></span> or number. </p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.hrtime-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an array of integers in the form [seconds, nanoseconds], if the parameter <code class="parameter">get_as_number</code> is false. Otherwise the nanoseconds 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> (32bit platforms). </p> </div> <div class="refsect1 examples" id="refsect1-function.hrtime-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-4670"> <p><strong>Example #1 <span class="function"><strong>hrtime()</strong></span> usage</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <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> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> 10444739687370679 Array ( [0] => 10444739 [1] => 687464812 ) </pre></div> </div> </div> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.highlight-string.html">highlight_string</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.ignore-user-abort.html">ignore_user_abort</a></div> <div class="up"><a href="ref.misc.html">Misc. Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>