function.imap-ping.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>Check if the IMAP stream is still active</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.imap-open.html">imap_open</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imap-qprint.html">imap_qprint</a></div> <div class="up"><a href="ref.imap.html">IMAP Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.imap-ping" class="refentry"> <div class="refnamediv"> <h1 class="refname">imap_ping</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imap_ping</span> — <span class="dc-title">Check if the IMAP stream is still active</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>imap_ping</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$imap_stream</tt></span> )</div> <p class="para rdfs-comment"> <b>imap_ping()</b> pings the stream to see if it's still active. It may discover new mail; this is the preferred method for a periodic "new mail check" as well as a "keep alive" for servers which have inactivity timeout. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt><span class="term"><i><tt class="parameter">imap_stream</tt></i></span><dd><p class="para">An IMAP stream returned by <a href="function.imap-open.html" class="function">imap_open()</a>.</p></dd></dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> if the stream is still alive, <b><tt>FALSE</tt></b> otherwise. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>imap_ping()</b> Example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$imap </span><span style="color: #007700">= </span><span style="color: #0000BB">imap_open</span><span style="color: #007700">(</span><span style="color: #DD0000">"{imap.example.org}"</span><span style="color: #007700">, </span><span style="color: #DD0000">"mailadmin"</span><span style="color: #007700">, </span><span style="color: #DD0000">"password"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// after some sleeping<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">imap_ping</span><span style="color: #007700">(</span><span style="color: #0000BB">$imap</span><span style="color: #007700">)) {<br /> </span><span style="color: #FF8000">// do some stuff to reconnect<br /></span><span style="color: #007700">}<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imap-open.html">imap_open</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imap-qprint.html">imap_qprint</a></div> <div class="up"><a href="ref.imap.html">IMAP Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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