MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::ping
mysqli_ping
Pings a server connection, or tries to reconnect if the connection has gone down
Object oriented style
public bool mysqli::ping();Procedural style
bool mysqli_ping(mysqli link);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.
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.
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
Returns true on success or
false on failure.
Example 3.57 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!