function.time-nanosleep.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Delay for a number of seconds and nanoseconds</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.sys-getloadavg.html">sys_getloadavg</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.time-sleep-until.html">time_sleep_until</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.time-nanosleep" class="refentry"> <div class="refnamediv"> <h1 class="refname">time_nanosleep</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">time_nanosleep</span> — <span class="dc-title">Delay for a number of seconds and nanoseconds</span></p> </div> <div class="refsect1 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"><b><b>time_nanosleep</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$seconds</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$nanoseconds</tt></span> )</div> <p class="para rdfs-comment"> Delays program execution for the given number of <i><tt class="parameter">seconds</tt></i> and <i><tt class="parameter">nanoseconds</tt></i>. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">seconds</tt></i></span> <dd> <p class="para"> Must be a positive integer. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">nanoseconds</tt></i></span> <dd> <p class="para"> Must be a positive integer less than 1 billion. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> <p class="para"> If the delay was interrupted by a signal, an associative array will be returned with the components: <ul class="itemizedlist"> <li class="listitem"> <span class="simpara"> <i>seconds</i> - number of seconds remaining in the delay </span> </li> <li class="listitem"> <span class="simpara"> <i>nanoseconds</i> - number of nanoseconds remaining in the delay </span> </li> </ul> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>time_nanosleep()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><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 milliseconds.\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: $seconds seconds, $nanoseconds nanoseconds."</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: <span class="simpara">This function is notimplemented on Windows platforms.</span></p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <a href="function.sleep.html" class="function" rel="rdfs-seeAlso">sleep()</a>, <a href="function.usleep.html" class="function" rel="rdfs-seeAlso">usleep()</a>, <a href="function.set-time-limit.html" class="function" rel="rdfs-seeAlso">set_time_limit()</a> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.sys-getloadavg.html">sys_getloadavg</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.time-sleep-until.html">time_sleep_until</a></div> <div class="up"><a href="ref.misc.html">Misc. 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