php error help

[danny420]

Hi im not sure if this error has always been there but i just noticed it.

It seems like it showed up after my game was spammed by some program that injects a bunch of usernames and into your database

Any way heres the error code i am getting

Warning: Division by zero in /home/kushcent/public_html/header.php on line 68

and when i navigate to line 68 i see this

$experc = (int) ($ir['exp'] / $ir['exp_needed'] * 100);

any help much apreciated :)

[rulerofzu]

Its maths...you cannot divide by 0 if you just had nonsense inputted into your database then its highly likely that this is the reason why.

I would suggest you close the game, clean up your database, fix your game and then open it again.

[Octarine]

Warning: Division by zero in /home/kushcent/public_html/header.php on line 68

...

$experc = (int) ($ir['exp'] / $ir['exp_needed'] * 100);

Which suggests that $ir['exp_needed'] is zero does it not? -- IIRC the exp_needed is calculated in the function check_level() in globals.php, something along the lines of pow($ir['level'] + 1, 3) * 2.2 which even for a missing, or null level would produce a semi-sane value therefore the problem is elsewhere.

echo / print_r / var_dump is your friend here - ie try inserting something like:

echo "<pre>"; print_r($ir); echo"</pre>";

just prior to line 68. Does the contents look sane? Are you looking at the right database? etc etc.

[Spudinski]

/offtopic

 

Its maths...you cannot divide by 0

False.

http://en.wikipedia.org/wiki/Division_by_zero#Abstract_algebra

[rulerofzu]

Depending on the maths and its application then yes in some cases what I stated is false. However in this application its true hence the error thrown as that how they have designed PHP to work.

Now if you wish to make a more complex calculation to make it work in PHP then by all means do so.

[sniko]

OP - look into try/catch, this may help with dividing by zero :)