[InfernoImmortal]

How should I add this
if(IsPlayerInRangeOfPoint(playerid, -1963.9784,639.1397,46.5625))

In that

if(!strcmp(cmdtext, "/Zlift", true))
{
SetPlayerPos(playerid, -1952.1819,632.2796,145.3092);
return 1;
}

What it is supposed to do is, if the player is near the coordinates -1963.9784,639.1397,46.5625 and types /zlift, he should get teleported to the koordinates -1952.1819,632.2796,145.3092