maxdb_ping

maxdb->ping

(PECL maxdb:1.0-7.6.00.38)

maxdb->ping — Pings a server connection, or tries to reconnect if the connection has gone down

说明

Procedural style:

bool maxdb_ping ( resource $link )

Object oriented style (method):

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.

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

范例

Example#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();
?>

Example#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);
?>

The above examples would produce the following output:

Our connection is ok!


	PHP5中文手册 maxdb_param_count maxdb_prepare MaxDB PHP Manual maxdb_ping maxdb->ping (PECL maxdb:1.0-7.6.00.38) maxdb->ping — Pings a server connection, or tries to reconnect if the connection has gone down 说明 Procedural style: bool maxdb_ping ( resource `$link` ) Object oriented style (method): 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. 返回值如果成功则返回 `TRUE`，失败则返回 `FALSE`。范例 Example#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(); ?>` Example#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); ?>` The above examples would produce the following output: Our connection is ok! maxdb_param_count maxdb_prepare MaxDB PHP Manual