[NaClchemistryK]

You have to put that script snippet above the code in which everything is done... Like this:

pawn Код:

CMD:banme(playerid,params[])
{
    new reason[15]
    if(sscanf(params,"s[15]",reason)) return SendClientMessage(playerid,-1,"Learn to use the command /banme you idiot.");
    Ban(playerid);
    if(strlen(reason) > 15) return SendClientMessage(playerid,-1,"Don't spam.");//this must be above "Ban(playerid);"
}

The strlen stuff must be above. So the correct one is:

pawn Код:

CMD:banme(playerid,params[])
{
    new reason[15]
    if(sscanf(params,"s[15]",reason)) return SendClientMessage(playerid,-1,"Learn to use the command /banme you idiot.");
    if(strlen(reason) > 15) return SendClientMessage(playerid,-1,"Don't spam.");//Right here it must be.
    Ban(playerid);
}