mysql_ping -- Ping a server connection or reconnect if there is no connection
bool mysql_ping ( [resource link_identifier] )
Checks whether or not the connection to
the server is working. If it has gone down, an automatic reconnection is
attempted. This function can be used by scripts that remain idle for a
long while, to check whether or not the server has closed the connection
and reconnect if necessary.
The MySQL connection. If the
link identifier is not specified, the last link opened by
mysql_connect() is assumed. If no such link is found, it
will try to create one as if mysql_connect() was called
with no arguments. If by chance no connection is found or established, an
E_WARNING level warning is generated.
Returns TRUE if the connection to the server MySQL server is working,