php - I need help adding a simple math captcha to my contact form for a website -

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i want add simple math captcha php form,,,

this complete form code doesnot work.

here link code: http://thefairygodsister.com/testtest/index%20-%20copy.txt

the basic steps take are: lets add 2 numbers kind of math

$num1 = rand(15,50); $num2 = rand(2,9); $salted_answer = $num1+num2 + 187; //thats salt

put salted_answer hidden input on form.

when checking:

if ($_post['salted_answer'] - 187 == $_post['answer']) {    echo "all good";   // processing  }

thats it.


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