[FuNkYTheGreat]

Код:

CheckPassword(string[])
{
    for(new i = strlen(string); i > 0; i--)
        if(!('A' <= string[i] <= 'Z') && !('a' <= string[i] <= 'z') && !('0' <= string[i] <= '9')) return false;

    return true;
}

Now check it like that in OnDialogResponse

Код:

new pKick[MAX_PLAYERS];
if(CheckPassword(inputtext))
{
       His password only contains Alphabets + numbers do your code now
}
else
{
      His password has some symbols or other language words,
      pKick[playerid] ++ ; // Adding +1 to his warning
      if(pKick[playerid] >= 10) // He've done this for more than 10 times
      {
            Kick(playerid); // Kicking him
      }
}