Mine

#define MAX_PROPS 100
enum prop_enum
{
	Float:xpos,
	Float:ypos,
	Float:zpos,
	fname[256]
}

stock PropUpFunc(playerid, propid, Float:size)
{
	new propinfo[prop_enum];
	set(propinfo[fname],propfile(dini_Get(PROP_MAIN, str(propid))));
	propinfo[xpos]=dini_Float(propinfo[fname], "x");
	propinfo[ypos]=dini_Float(propinfo[fname], "y");
	propinfo[zpos]=dini_Float(propinfo[fname], "z");
    if(GetPlayerDistanceToPointEx(playerid,propinfo[xpos],propinfo[ypos],propinfo[zpos]) < PROP_DIST)
	{
		if(Player[playerid][area]!=propid)
		{
			Player[playerid][area]=propid;
			SetPlayerCheckpoint(playerid,propinfo[xpos],propinfo[ypos],propinfo[zpos],size);
		}
		return true;
	} else if(Player[playerid][area]==propid)
	{
		DisablePlayerCheckpoint(playerid);
		Player[playerid][area]=0;
		return true;
	}
	return false;
}

#define PropUp(%1,%2,%3) if(PropUpFunc(%1,%2,%3)) return true

CheckpointUpdate(playerid)
{
	for(new i = 1; i <= dini_Int(PROP_MAIN, IDS); i++)
	{
	    if(MAX_PROPS-1 < i) return false;
 	    PropUp(playerid, i, dini_Float(propfile(dini_Get(PROP_MAIN, str(i))), "size"));
    }
    return false;
}