[SickAttack]

pawn Код:

#define isnull(%1) \
((!(%1[0])) || (((%1[0]) == '\1') && (!(%1[1]))))

Example:

pawn Код:

if(isnull(inputtext)) return SendClientMessage(playerid, -1, "Inputted text is null.")
else return SendClientMessage(playerid, -1, "Inputted text isn't null.")