[TwinkiDaBoss]

For the love of God use sscanf and ZCMD....

pawn Код:

new playerPrefix[MAX_PLAYERS][24];

CMD:changeprefix(playerid,params[]) {
    new prefix[24];
    if(sscanf(params,"s[24]",prefix)) return SendClientMessage(playerid,COLOR_RED,"Usage: /changeprefix [Prefix]");
    if(strlen(prefix) >= 25 || strlen(prefix) <= 0) return SendClientMessage(playerid,COLOR_RED,"Invalid prefix size");
    format(playerPrefix[playerid],sizeof(prefix),"%s",prefix);
    return true;
}