Regular Expressions 101

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Community Patterns

1

Copyright Search

PCRE (PHP <7.3)
searches for either Copyright or copyright symbol, or the programmer's short hand of (c) (which is NOT legal, use the symbol!).
Submitted by Henry Rieke - 9 years ago
1

Catastrophic Backtrack

PCRE (PHP <7.3)
This regexp matches urls, but causes catastrophic backtrack
Submitted by anonymous - 9 years ago
1

Chemical formula regex

PCRE (PHP <7.3)
Parses some chemical formula
Submitted by anonymous - 9 years ago
1

Search for Abbreviations and acronyms

PCRE (PHP <7.3)
no description available
Submitted by Agustín Bouillet - 9 years ago
1

Apache Error Log Date Parsing

PCRE (PHP <7.3)
Parse the date from an Apache Error Log in the format of "Wed Jun 01 20:05:21.12345 2016"
Submitted by garys - 9 years ago
1

ip addr

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

timestamp offset

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

Url Exclud word

PCRE (PHP <7.3)
exclude match if a word is in the url
Submitted by anonymous - 9 years ago
1

Perfect URL Validation

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
1

Helpful for refactoring functions (ex: removing second argument)

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

Amplify

PCRE (PHP <7.3)
Amplify XDA Guide
Submitted by anonymous - 9 years ago
1

click_error

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

work trimming output

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1

HPE / report part 4

PCRE (PHP <7.3)
no description available
Submitted by stelf - 9 years ago
1

IP range 193.172.166.100 193.172.166.251

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
1

IP Range 193.172.166.0 - 193.172.166.31

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
1

Verify Password

PCRE (PHP <7.3)
I verify if a string contains from 8 to 10 char and at least one of the following: Upper case char, lower case char, number, special character
Submitted by exSnake - 9 years ago
1

Formato RUN

PCRE (PHP <7.3)
Formato del Rol Único Nacional en Chile
Submitted by Jorge Moyano Fuentes - 9 years ago
1

Match for courses

ECMAScript (JavaScript)
Match with courses like: AB123, AB 123, ABC123 or ABC 123
Submitted by Matheus Sampaio - 9 years ago
1

controllers check

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1...180181182183184...902

Community Library Entry

1

Regular Expression
PCRE (PHP <7.3)

/
(?:(?:(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)*(?:\.([a-z\x{00a1}-\x{ffff}]{2,})))(?::\d{2,5})?(?:\/[^\s]*)?
/
g
Open regex in editor

Description

This regexp matches urls, but causes catastrophic backtrack

Submitted by anonymous - 9 years ago