Владимир

same => n,Set(dannie=1,2,4,3,5)
same => n,Set(X=1)
same => n,Set(DEV=${CUT(dannie,\,,1)})
same => n,While($[${EXISTS(${DEV})}])
same => n,NoOp(DEV = ${DEV})
same => n,Set(X=$[${X} + 1])
same => n,Set(DEV=${CUT(dannie,\,,${X})})
same => n,EndWhile()

...
$aaa = array();
while ($row = mysql_fetch_array($resultFriends, MYSQL_ASSOC)) {
    $aaa[] = array(
             "id_friend" => $row['id'],
             "name_friend" => (string)$row['name'],
             "surname_friend" => (string)$row['surname'],
             "city_friend" => (string)$row['city']
    );
}
var_dump($aaa);
echo json_encode($aaa, JSON_UNESCAPED_UNICODE);

sed -i '/[[:digit:]]<\/maxplayers>/{s/55/128/g}' /path/to/file

seletc * from талбица order by столбец desc limit 1