[Jefff]

It must be placed before usage GetPlayerHealthEx

Good:

pawn Код:

stock Float: GetPlayerHealthEx(playerid, &Float: vidas) // warning 208: function with tag result used before definition, forcing reparse
{
    vidas = vida[playerid];
    return vidas;
}

GetPlayerHealthEx(playerid, variable);

Wrong:

pawn Код:

GetPlayerHealthEx(playerid, variable);

stock Float: GetPlayerHealthEx(playerid, &Float: vidas) // warning 208: function with tag result used before definition, forcing reparse
{
    vidas = vida[playerid];
    return vidas;
}

or little trick without warning

pawn Код:

GetPlayerHealthEx(playerid, &Float: vidas) // warning 208: function with tag result used before definition, forcing reparse
{
    vidas = vida[playerid];
    return _:vidas;
}