math test

[juniorek9]

Hi Guys. I need some hep with a small math thing regarding the math. I`m trying to make the php code so it generates math questions and check the answers. i got the part with asking questions working but how do i get the php to work out the correct answer and compare with the posted answer?  My bit of a code to work the questions is bellow

18195_.txt

[silkfire]

If the math answers are simple operand type, you can use eval but you might need some replacements done first.

 

$answer = '4 x 5';

 

$answer = str_replace('x', '*', $answer);

 

eval('$answer = ' . $answer . ';');

 

 

But be careful eval is discouraged but I don't know the alternative.