📄 function.pg-get-pid.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>Gets the backend's process ID</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.pg-get-notify.html">pg_get_notify</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-get-result.html">pg_get_result</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.pg-get-pid" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_get_pid</h1> <p class="verinfo">(PHP 4 >= 4.3.0, PHP 5)</p><p class="refpurpose"><span class="refname">pg_get_pid</span> — <span class="dc-title">Gets the backend's process ID</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>pg_get_pid</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> )</div> <p class="para rdfs-comment"> <b>pg_get_pid()</b> gets the backend's (database server process) PID. The PID is useful to determine whether or not a <i>NOTIFY</i> message received via <a href="function.pg-get-notify.html" class="function">pg_get_notify()</a> is sent from another process or not. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> PostgreSQL database connection resource. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The backend database process ID. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 PostgreSQL backend PID</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php <br />$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"An error occured.\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #FF8000">// Backend process PID. Use PID with pg_get_notify()<br /></span><span style="color: #0000BB">$pid </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_get_pid</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.pg-get-notify.html" class="function" rel="rdfs-seeAlso">pg_get_notify()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-get-notify.html">pg_get_notify</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-get-result.html">pg_get_result</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL 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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