Unset global var in recurrent function

[Stingus]

This is the example code:

function MyFunction($i) { 
    global $GlobalVar; 

$GlobalVar += $i; 
if ($GlobalVar < 10) { 
    MyFunction($i);
} 

return $GlobalVar; 
}

MyFunction(1); 

echo $GlobalVar; // displays 10 

MyFunction(1); 

echo $GlobalVar; // displays 11 

My task is to reset GlobalVar to 0 at each FIRST CALL of MyFunction. For recurrent calls GlobalVar should increment. I can reset GlobalVar before each call of MyFunction like this:

unset($GlobalVar);
MyFunction(1); 

but I dont embrace this solution since I might forget to unset it at some point. I need to do the reset inside the function. Can reference vars help here?

Thanks for any ideas

[Installer]

If the only point is to use "global" and a recursive function, this will work:

function MyFunction($i, $var = 0) 
{ 
    global $GlobalVar;
    $GlobalVar = $var;
    if ($var < 10) { 
        $var += $i;
        MyFunction($i, $var);
    }
}

MyFunction(1);

Otherwise, more sensibly, imo, without globals and recursion:

function MyFunction($i) 
{ 
    $var = 0;
    while ($var < 10) { 
        $var += $i; 
    } 
    return $var; 
} 

$GlobalVar = MyFunction(1);

or:

function MyFunction2($i, &$var) 
{ 
    $var = 0;
    while ($var < 10) { 
        $var += $i; 
    } 
}
MyFunction(1, $GlobalVar);

[Stingus]

Thanks Installer! First example worked for me, the recursive function was mandatory. All the messy code I wrote is gone now... 🙂