new pHealth = GetPlayerHealth(playerid);
                        GetPlayerHealth(playerid);

 

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
#define HOLDING(%0) \\
((newkeys & (%0)) == (%0))
if (HOLDING( KEY_FIRE ))
{
    new Float:pHealth[MAX_PLAYERS];
GetPlayerHealth(playerid,pHealth[playerid]);
SetPlayerHealth(playerid,pHealth[playerid]);
}
return 1;
}