PHP intval() weird results

Question

I\'m encountering something weird and I don\'t know why it is happening!

I have a URL like:

http://mysite.com/users/USER_ID

this user id

Answer 1

From http://php.net/manual/en/language.operators.comparison.php

Example       Name        Result

$a == $b      Equal       TRUE if $a is equal to $b after type juggling.

$a === $b     Identical   TRUE if $a is equal to $b,
                          and they are of the same type. 

Your string is casted to integer because of type juggling on == operator and intval() of a string returns 0

This explains why $id == $id_inted in your code evaluates to true.

If you make your test with === instead of == no type juggling will be performed.