How to rename prefix all tables of the database, compatible with php 5.x and php 7.x

FOR PHP 5.x

 ";
} else {
echo "Error: $old_table_name was not renamed" . mysql_error( $session_id ) . "
";
}
}
mysql_close( $session_id );
?>

FOR PHP 7.x

 ";
        } else {
            echo "Error: $old_table_name was not renamed" . mysql_error( $session_id ) . "
";
        }
}

mysqli_close($session_id);
?>