(PHP 4 >= 4.0.5)
mysql_get_proto_info -- Get MySQL protocol info
Description
int 
mysql_get_proto_info ( [resource link_identifier])
     mysql_get_proto_info() returns the protocol
     version used by connection
     link_identifier.  If
     link_identifier is omited, the last opened
     connection will be used.
    
     mysql_get_proto_info() was added in PHP 4.0.5.