Php/docs/mysqli.ping
mysqli::ping
mysqli_ping
(PHP 5, PHP 7)
mysqli::ping -- mysqli_ping — Pings a server connection, or tries to reconnect if the connection has gone down
Description
Object oriented style
public mysqli::ping ( ) : bool
Procedural style
mysqli_ping
( mysqli $link
) : bool
Checks whether the connection to the server is working. If it has gone down and global option mysqli.reconnect is enabled, an automatic reconnection is attempted.
Note:
The
php.inisetting mysqli.reconnect is ignored by the mysqlnd driver, so automatic reconnection is never attempted.
This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary.
Parameters
link- Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 mysqli::ping() example
Object oriented style
<?php$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */if ($mysqli->connect_errno) { printf("Connect failed: %s\n", $mysqli->connect_error); exit();}/* check if server is alive */if ($mysqli->ping()) { printf ("Our connection is ok!\n");} else { printf ("Error: %s\n", $mysqli->error);}/* close connection */$mysqli->close();?>
Procedural style
<?php$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();}/* check if server is alive */if (mysqli_ping($link)) { printf ("Our connection is ok!\n");} else { printf ("Error: %s\n", mysqli_error($link));}/* close connection */mysqli_close($link);?>
The above examples will output:
Our connection is ok!
