Regular Expressions 101

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Regular Expressions 101

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482
pcre

regex101.com id grabber

grabs the ID for the regex101.com permalink to code
Submitted by chris mccoy - 9 years ago
234
pcre

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.
Submitted by Michael Musson - 9 years ago
105
javascript

trim

trim string
Submitted by fp - 10 years ago
84
javascript

Password Validation

Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.
Submitted by Christian Klemp - 8 years ago
81
python

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 prev...
Submitted by Firas Dib - 9 years ago
71
javascript

Regex for telephone numbers all over the world

Detects most of the phone numbers all over the world
Submitted by Aditya Joshi - 9 years ago
51
pcre

Disorted Email Addresses

Matches distorted email addresses and converts them back to real ones.
Submitted by dislick - 10 years ago
40
pcre

URL regexp

A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.
Submitted by Matthew O'Riordan - 10 years ago
37
pcre

http://

no description available
Submitted by Mitus M. - 9 years ago
35
javascript

IP Address validator

Validates IPv4 IP Address
Submitted by krzysp - 8 years ago
34
javascript

Google like regex

Attempts to mimic Google search box behavior, returning an array with the separated search strings (that keep the +/- indicator for following operations)
Submitted by mettjus - 9 years ago
32
pcre

ninite

no description available
Submitted by peek - 7 years ago
31
javascript

Email address (most used)

Email address, most used cases
Submitted by Jago - 8 years ago
28
pcre

Wrap long string to spec length

no description available
Submitted by fullpipe - 10 years ago
28
pcre

CSV line parsing

Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.
Submitted by Various - 8 years ago
26
pcre

match valid JSON

Matches any valid JSON object, matches recursively. Passes all JSON test cases I found.
Submitted by Mateon1 - 8 years ago
24
javascript

Quote Macthing with escape

Matches text within quotes (", ') and escapes the charecters.
Submitted by Vihan Bhargava - 8 years ago
23
pcre

userName

1-15 alphanumeric login name
Submitted by gsanchezc - 8 years ago
22
pcre

UK Postcode Checker

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...
Submitted by MaffooBristol - 8 years ago
22
javascript

grab valid css rules and properties

no description available
Submitted by Pavel Dominguez - 8 years ago
1234...839

Floating point and scientific notation regex

Vote

0

Regular Expression
pcre2

/
^ (?: [+-]? # optional sign (?: # start a conditional group \d+ # either a nonzero number of digits | # or a decimal phrase \d* # optional digits preceding the decimal \.(?=\d) # a literal decimal followed by at least one digit \d* # optionally some more digits ) # note this group is mandatory! (?: # start an optional scientific notation group [eE] # the scientific notation character [+-]? # optional sign \d+ # after sci notation, you cannot go directly to a decimal )? ) $
/
gmx
Open regex in editor

Description

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Submitted by Kevin Winner - 4 months ago