Regular Expressions 101

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Community Patterns

9

domain - host

Python
no description available
Submitted by anonymous - 9 years ago
9

only numbers

PCRE (PHP <7.3)
A string with only numbers in
Submitted by Gotts - 9 years ago
9

Letters, numbers and blank space

PCRE (PHP <7.3)
The following regular expression matches only letter a-z A-Z numbers 0-9 and a blank space for a given string.
Submitted by Jordan Raychev - 9 years ago
9

Fiddler raw body to PHP array

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

extract subdomain(if available) or domain from URL

Python
This regex should extract the subdomain, if any, or the domain, if no subdomain is used, from an arbitrary URL
Submitted by trevi@twanda.com - 9 years ago
10

Just validate one sequence of

PCRE (PHP <7.3)
sdfs sdfs FLBREV00022230 dsfsdfs sdfsf FLBREV00022234 In this case is false
Submitted by Fiipe - 10 years ago
10

Strip Email ID from Name

PCRE (PHP <7.3)
Use this regex to select all characters up to the "" bracket. It works across multiple lines. You can get an email list with only the IDs. This is the pattern it matches: Alpha Person Step 1 (.*) [$ Step 2 [$.$] (.*) gives you aperson@whatever.org...
Submitted by Jonathan Davidar - 10 years ago
10

Find Reddit Threads

Python
Simply searches for the thread-id in any kind of valid reddit-URL.
Submitted by Mio - 10 years ago
10

MikroTik FireWall

PCRE (PHP <7.3)
Regex used in Splunk to extract fields from Mikrotik FW. NOTES: Mikrotik must be configured to use "BSD Syslog" format FW rules must add, as log prefix, the action: drop accep...
Submitted by HappyIdeasMaker - 9 years ago
10

money: either 0 or 2 dp

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

entity

Python
no description available
Submitted by anonymous - 9 years ago
10

Valid Telephone Number

ECMAScript (JavaScript)
This regex validates varying types of telephone numbers.
Submitted by Adam Recvlohe - 9 years ago
10

Conventional Commits validation

Python
This regex prevents the writing of non-standard conventional commits. I'm available on my github
Submitted by Krisque - 3 years ago (Last modified 3 years ago)
11

Address Check Validation

PCRE (PHP <7.3)
Check for true or false street address format
Submitted by Dilip Borad - 11 years ago
11

Date(Including Leap Year) YYYY-MM-DD hh:mm:ss

PCRE (PHP <7.3)
Validates DateTime of format YYYY-MM-DD hh:mm:ss including Leap Year
Submitted by Madhan - 11 years ago
11

html color match: transparent, #fff, #123456, rgb, rgba, hsl, hsla

ECMAScript (JavaScript)
This may be useful or not to test whether a given string is a valid (more or less) html color value. It matches color values such as: #123 - short hex color value #123456 - hex color value rgb(255,255,0) - rgb color value rgba(255,255,0,1.0) - rgba color value hsl(360,100%,100%) - hsl color value...
Submitted by grouch - 10 years ago
11

remove comments from php code

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
11

find all link(<a>) tags expect your links in href attribute

ECMAScript (JavaScript)
YourLink - not found AnotherLink - found
Submitted by KoT - 9 years ago
11

youtube url match

ECMAScript (JavaScript)
extract video id, index, play list id from youtube url
Submitted by anonymous - 9 years ago
11

Codice fiscale

PCRE (PHP <7.3)
Check "codice fiscale"
Submitted by Luca - 9 years ago
1...895896897898899900

Community Library Entry

0

Regular Expression
PCRE2 (PHP >=7.3)

/
\b(?:(?<FirstOctet>(?:25[0-5]|2[0-4][0-9]|[0-1][0-9]{2})|(?:[0-9]{1,2}))\.(?<SecondOctet>(?:25[0-5]|2[0-4][0-9]|[0-1][0-9]{2})|(?:[0-9]{1,2}))\.(?<ThirdOctet>(?:25[0-5]|2[0-4][0-9]|[0-1][0-9]{2})|(?:[0-9]{1,2}))\.(?<FourthOctet>(?:25[0-5]|2[0-4][0-9]|[0-1][0-9]{2})|(?:[0-9]{1,2}))){1}\b
/
gm
Open regex in editor

Description

Matches on IPv4 addresses and groups each octet.

Submitted by Jon Stinnett - 2 years ago