[StaticYey]

PHP код:

new playerName[MAX_PLAYER_NAME];
new slicedName[2][MAX_PLAYER_NAME];
GetPlayerName(playerid,name,MAX_PLAYER_NAME);
split(playerName, slicedName, '_');
printf("Your firstname is %s and your lastname is %s.", slicedName[0], slicedName[1]); 


Use slicedName[0] and slicedName[1] for the first name and last name respectively.