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maxdb_ping (PECL) maxdb_ping (no version information, might be only in CVS) maxdb->ping --
Pings a server connection, or tries to reconnect if the connection has gone down
DescriptionProcedural style: bool maxdb_ping ( resource link ) Object oriented style (method): class maxdb { bool ping ( void ) }
Checks whether the connection to the server is working. If it has gone
down, and global option maxdb.reconnect is enabled
an automatic reconnection is attempted.
This function can be used by clients that remain idle for a long while,
to check whether the server has closed the connection and reconnect if
necessary.
Return values若果成功則返回 TRUE，失敗則返回 FALSE。 Example例子 1. Object oriented style
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* check if server is alive */
if ($maxdb->ping()) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", $maxdb->error);
}
/* close connection */
$maxdb->close();
?>
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例子 2. Procedural style
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* check if server is alive */
if (maxdb_ping($link)) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", maxdb_error($link));
}
/* close connection */
maxdb_close($link);
?>
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The above examples would produce the following output:
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