Oracle 5.0, Справочное руководство

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MySQL Improved Extension (
Mysqli
)
2398
Object oriented style
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.
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 20.134.
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)) {