inthisx_00
New member
i know captcha is for human to input only, but how does it work in php code?
my imagination is it works with an image and session.first a user input the letters and in another p page these letters will be checked with session which stores the correct letters.
am i rigth in my imaginatoin or not?
i am tring to write a captcha code hardly but i don't really know how it works.
thanks. Undaunted !!
i have finished reading it.
but using sessions seems to cause security problem.
when a lot of users online the session stores much captcha,too.
so will it succeed if a malicious guy want to break captcha by randomly obtaining string using robot?
is it the best that storing string in database ?
my imagination is it works with an image and session.first a user input the letters and in another p page these letters will be checked with session which stores the correct letters.
am i rigth in my imaginatoin or not?
i am tring to write a captcha code hardly but i don't really know how it works.
thanks. Undaunted !!
i have finished reading it.
but using sessions seems to cause security problem.
when a lot of users online the session stores much captcha,too.
so will it succeed if a malicious guy want to break captcha by randomly obtaining string using robot?
is it the best that storing string in database ?