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https://github.com/sigmasternchen/php-doc-en
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6a0fe1549d
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@163703 c90b9560-bf6c-de11-be94-00142212c4b1
85 lines
2.4 KiB
XML
85 lines
2.4 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.5 $ -->
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<!-- splitted from ./en/functions/mysql.xml, last change in rev 1.100 -->
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<refentry id="function.mysql-ping">
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<refnamediv>
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<refname>mysql_ping</refname>
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<refpurpose>Ping a server connection or reconnect if there is no connection</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>bool</type><methodname>mysql_ping</methodname>
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<methodparam choice="opt"><type>resource</type><parameter>
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link_identifier
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</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>mysql_ping</function> checks whether or not the connection to
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the server is working. If it has gone down, an automatic reconnection is
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attempted. This function can be used by scripts that remain idle for a
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long while, to check whether or not the server has closed the connection
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and reconnect if necessary.
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<function>mysql_ping</function> returns &true; if the connection to the
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server is working, otherwise &false;.
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</para>
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<para>
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<example>
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<title>A <function>mysql_ping</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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set_time_limit(0);
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$conn = mysql_connect('localhost', 'mysqluser', 'mypass');
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$db = mysql_select_db('mydb');
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/* Assuming this query will take a long time */
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$result = mysql_query($sql);
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if (!$result) {
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echo 'Query #1 failed, exiting.';
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exit;
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}
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/* Make sure the connection is still alive, if not, try to reconnect */
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if (!mysql_ping($conn)) {
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echo 'Lost connection, exiting after query #1';
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exit;
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}
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mysql_free_result($result);
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/* So the connection is still alive, let's run another query */
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$result2 = mysql_query($sql2);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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See also
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<function>mysql_thread_id</function> and
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<function>mysql_list_processes</function>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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