MYSQLI_CLOSE(3) 1 MYSQLI_CLOSE(3)mysqli::close - Closes a previously opened database connection
Object oriented style
SYNOPSIS
bool mysqli::close (void )
DESCRIPTION
Procedural style
bool mysqli_close (mysqli $link)
Closes a previously opened database connection.
PARAMETERS
o $
link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3)RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
See mysqli_connect(3).
SEE ALSO
mysqli::__construct, mysqli_init(3), mysqli_real_connect(3).
PHP Documentation Group MYSQLI_CLOSE(3)
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MYSQLI_PING(3) 1 MYSQLI_PING(3)mysqli::ping - Pings a server connection, or tries to reconnect if the connection has gone down
Object oriented style
SYNOPSIS
bool mysqli::ping (void )
DESCRIPTION
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.
This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and recon-
nect if necessary.
PARAMETERS
o $
link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3)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
", $mysqli->connect_error);
exit();
}
/* check if server is alive */
if ($mysqli->ping()) {
printf ("Our connection is ok!
");
} else {
printf ("Error: %s
", $mysqli->error);
}
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s
", mysqli_connect_error());
exit();
}
/* check if server is alive */
if (mysqli_ping($link)) {
printf ("Our connection is ok!
");
} else {
printf ("Error: %s
", mysqli_error($link));
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
Our connection is ok!
PHP Documentation Group MYSQLI_PING(3)