Used with mysql_multi_query() to check if there are more result sets to be returned
function mysql_more_results( ?resource $link_identifier = NULL, ): bool;
resource $link_identifier = NULL- 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 no connection is found or established, an E_WARNING level error is generated.
bool- - True if there is at least one more item in the result set.