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68 lines
3.4 KiB
HTML
68 lines
3.4 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>Check if the IMAP stream is still active</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.imap-ping" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imap_ping</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imap_ping</span> — <span class="dc-title">Check if the IMAP stream is still active</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imap-ping-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>imap_ping</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$imap_stream</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>imap_ping()</strong></span> pings the stream to see if it's still
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active. It may discover new mail; this is the preferred method for a
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periodic "new mail check" as well as a "keep alive" for servers which
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have inactivity timeout.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imap-ping-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">
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imap_stream</code></dt>
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<dd>
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<p class="para">由 <span class="function"><a href="imap_open.html" class="function">imap_open()</a></span> 返回的 IMAP 流。</p></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.imap-ping-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns <strong><code>TRUE</code></strong> if the stream is still alive, <strong><code>FALSE</code></strong> otherwise.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.imap-ping-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-4032">
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<p><strong>Example #1 <span class="function"><strong>imap_ping()</strong></span> Example</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 /><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>
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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></div></div></body></html> |