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is the largest regular expression database for regex pattern and matches containing searchable and filterable records for many different languages
Matching email addresses per RFC5322
The BNF rules from RFC 5322 transformed to PCRE by Nikita Popov and described in the post http://nikic.github.io/2012/06/15/The-true-power-of-regular-expressions.html.
Email address (most used)
Email address, most used cases
Password Validation Regex
Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.
Disorted Email Addresses
Matches distorted email addresses and converts them back to real ones.
Regex for telephone numbers all over the world
Detects most of the phone numbers all over the world
Distinguish torrent files (series vs movies)
A neat regex for finding out whether a given torrent name is a series or a movie. Returns the full name of the series with the separator needed to make it pretty (ie, replace it with space or what you want). Also returns the season number or the year for the movie/series, depending on what was previously matches. If I had done this in perl there would be much less logic needed in the regex, but python is what I'm working with so..
regex101.com id grabber
grabs the ID for the regex101.com permalink to code
A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.