[xXShadowXx]

pawn Код:

#define IsPlayerVip(%0)             (gettime() < pVipExpiry[%0])
#define ExtendPlayerVip(%0,%1)      if(pVipExpiry[%0] > gettime()) pVipExpiry[%0] += (86400 * %1); else pVipExpiry[%0] = (gettime() + (86400 * %1))

new pVipExpiry[MAX_PLAYERS];

Use ExtendPlayerVip(playerid,days); in your /makevip command.
Use if(IsPlayerVip(playerid)) in your vip commands, it returns 1 if the player is vip or 0 if not.

Don't forget to store the expiry date somewhere, and load / save it.