Regular Expressions 101

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31

Strict Password Validator

ECMAScript (JavaScript)
This regex matches only when all the following are true: password must contain 1 number (0-9) password must contain 1 uppercase letters password must contain 1 lowercase letters password must contain 1 non-alpha numeric number...
Submitted by qho - 6 years ago (Last modified 9 months ago)
10

best youtube id match ( iframe embed replace ready )

Recommended
PCRE (PHP <7.3)
MATCH ANY YOUTUBE ID author : mi-ca v1.0 – 2017.03.08 This Regex match any youtube url and grab the ID. Embed ready √ --...
Submitted by mi-ca.ch - 5 years ago
24

Cron schedule

Recommended
PCRE (PHP <7.3)
Validate cron lines (even the ones commented out)
Submitted by anonymous - 8 years ago
25

Parsing browser User Agents

PCRE (PHP <7.3)
From a (fairly large) list of User Agent strings, extract the OS, Browser, and Device Type.
Submitted by OnlineCop - 9 years ago (Last modified 9 months ago)
10

Conventional Commits validation

PCRE (PHP <7.3)
This regex prevents the writing of non-standard conventional commits. I'm available on my github
Submitted by Krisque - 2 years ago (Last modified 9 months ago)
14

Email regex validation

ECMAScript (JavaScript)
RegEx email /^((?!\.)[\w-_.]*)(@\w+)(\.\w+(\.\w+)?)$/gim; Just playing with Reg Ex. This to validate emails in following ways ...
Submitted by https://www.linkedin.com/in/peralta-steve-atileon/ - 5 years ago (Last modified 9 months ago)
14

RFC3339 DateTime

Recommended
PCRE (PHP <7.3)
Validates a RFC3339 DateTime format. Does not validates the Data
Submitted by anonymous - 8 years ago
9

Fiddler raw body to PHP array

PCRE (PHP <7.3)
no description available
Submitted by garsax - 8 years ago
9

CSS Color Matcher

ECMAScript (JavaScript)
Pattern matching and extracting color code formats using RegEx. https://github.com/Kyza/color-regex/
Submitted by Kyza - 8 months ago
11

youtube url match

ECMAScript (JavaScript)
extract video id, index, play list id from youtube url
Submitted by anonymous - 9 years ago
17

Email (RFC2822)

Recommended
ECMAScript (JavaScript)
Email address compliant with RFC2822
Submitted by Jago - 9 years ago
7

IP Address (with 0s)

ECMAScript (JavaScript)
Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255
Submitted by Ryan Plummer - 9 years ago
24

grab valid css rules and properties

ECMAScript (JavaScript)
no description available
Submitted by Pavel Dominguez - 9 years ago
10

IPv4 Validator

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 4 years ago (Last modified 8 months ago)
11

remove comments from php code

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
13

US Currency Format

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
14

us postal/zip

ECMAScript (JavaScript)
no description available
Submitted by jay johnson - 10 years ago
9

Fixo LDN CSP e SEM CSP

PCRE (PHP <7.3)
no description available
Submitted by Marcos Müller - 9 years ago
483

regex101.com permalink id grabber

PCRE (PHP <7.3)
Grabs the ID for the regex101.com permalink code. If a revision number is provided, grab that as well.
Submitted by chris mccoy - 10 years ago (Last modified 7 days ago)
236

Matching email addresses per RFC5322

PCRE (PHP <7.3)
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 - 10 years ago
123...642

Validate Base64 with new lines (e.g. GPG base64 messages)

3

Regular Expression
PCRE (PHP <7.3)

/
(?:^(?:[A-Za-z0-9+\/]{4}\n?)*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)$)
/
Open regex in editor

Description

This regular expression validates if given string is formatted in Base64, additional it accepts new lines, since payload can have new lines in it.

Submitted by wpodgorski - 9 years ago