php-doc-en/reference/pgsql/functions/pg-get-pid.xml

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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.pg-get-pid" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_get_pid</refname>
<refpurpose>Gets the backend's process ID</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>pg_get_pid</methodname>
<methodparam><type>PgSql\Connection</type><parameter>connection</parameter></methodparam>
</methodsynopsis>
<para>
<function>pg_get_pid</function> gets the backend's (database server
process) PID. The PID is useful to determine whether or not a <literal>NOTIFY</literal>
message received via <function>pg_get_notify</function> is sent from another process
or not.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
&pgsql.parameter.connection;
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The backend database process ID.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&pgsql.changelog.connection-object;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>PostgreSQL backend PID</title>
<programlisting role="php">
<![CDATA[
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
// Backend process PID. Use PID with pg_get_notify()
$pid = pg_get_pid($conn);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_get_notify</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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