(PHP 5, PHP 7, PHP 8)
mysqli::ping -- mysqli_ping — Pings a server connection, or tries to reconnect if the connection has gone down
Object-oriented style
Procedural style
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.ini setting 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.
mysql
Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()
Returns true
on success or false
on failure.
If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR
) and the requested operation fails,
a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT
,
a mysqli_sql_exception is thrown instead.
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!