Hi,
I'm defining new regex validators in cake/validator.php file. I have
worked with regex in other projects but indeed I don't understand some
issues of the regex that was defined in cake by default.
Example:
define('VALID_EMAIL', '/\\A(?:^([a-z0-9][a-z0-9_\\-\\.\\+]*)@([a-z0-9]
[a-z0-9\\.\\-]{0,63}\\.(com|org|net|biz|info|name|net|pro|aero|coop|
museum|[a-z]{2,4}))$)\\z/i');
I don't understand:
- Why is used a double escape \\ bar instead of a single bar \
- What is the meaning of "A(?:" at start of regex
- Why there is a "/" at start
-What is the meaning of "\\z/i" at final of regex
I searched for regex manuals in google but i not found response for my
doubts. Neither in this googlegroup.
Excuse me for my bad english and if my doubts are basic.
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