In this section there will be few challenges, but they will require a lot of time and effort.
Google is your friend.
Level: Easy-Medium
Vulnerability: Assert()
Hint: You can go back and see some examples.
Link: Challenge 1
Level: Easy-Medium
Vulnerability: preg_replace()
Hint: You can go back and see some examples.
Link: Challenge 2
Level: Easy-Medium
Vulnerability: PHP loose comparison
Hint: Remember what is wrong with strcmp().
Hint 2: Remember the cheat sheet when comparing booleans.
Link: Challenge 3
Level: Easy-Medium
Vulnerability: PHP unserialize
Hint: Try to remember what does the magic function do.
Link: Challenge 4
Level: Medium
Vulnerability: PHP unserialize
Hint: Try to remember what does the magic function do.
Link: Challenge 5
Level: Hard
Vulnerability: PHP serialize
Hint: Try to understand what the code is doing.
Link: Challenge 6
Level: Hard
Vulnerability: PHP preg_replace()
Hint: Try to understand what the code is doing.
Link: Challenge 7
Level: Hard
Vulnerability: PHP serialization
Hint: Try to understand what the code is doing.
Hint: What is the cookie doing?.
Link: Challenge 8