Regular Expressions 101

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Community Patterns

1

LogExpert Regex Columnizer

PCRE (PHP <7.3)
parsing log file
Submitted by Oddbjørn Haaland, Sander Struijk - 10 years ago
22

UK Postcode Checker

PCRE (PHP <7.3)
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 - 10 years ago
1

Reg124

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
7

if, else if, else condtion match

ECMAScript (JavaScript)
matches full if condition statment eg: if(condition){ ... } else if(condition){ ... }else{...
Submitted by Ivan Jakesevic - 10 years ago
1

RegExExample

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
1

RFC 5322 email validation

PCRE (PHP <7.3)
Unsatisfied with your email validation? Concerned about standards compliance? Worried about that one weird edge case? Want to stress-test your regex engine? This might be the regex for you!
Submitted by Blake Thomas - 10 years ago
0

Domain Name .CZ - only 2th level format

PCRE (PHP <7.3)
Valid only for something.cz, some-thing.cz, 2245exampl.cz ... Not-valid for -some.cz, here.com.cz ...
Submitted by Pavel Ondřej - 10 years ago
0

first regex

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
3

everything that doesn't match .gitignore at the end

PCRE (PHP <7.3)
must match: selection/nl/example.xml selection/example.xml selection/blabla.txt selection/es/ ...
Submitted by anonymous - 10 years ago
2

Positive Numbers greater than 0 with leading zeroes.

ECMAScript (JavaScript)
Accepts all positive numbers above 0. Accepts numbers with leading zeroes e.g.: 0123, 00123.
Submitted by Sandeep Ranka - 10 years ago
0

Unicode alpha-numeric regex

PCRE (PHP <7.3)
Tests for all unicode language characters and number. Excludes any sentence joining characters etc.
Submitted by Jamie - 10 years ago
1

External OR operator

PCRE (PHP <7.3)
Why doesn't recognize the second pattern after pipe | ?
Submitted by Fede e Walter - 10 years ago
0

search h1 tag html

PCRE (PHP <7.3)
(.*?) example: Your best title
Submitted by otharwa - 10 years ago
1

codegolf.SE cops&robbers histocrat#2

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
0

Page Hangs in Chrome/Shows TIMEOUT on regex101.com

PCRE (PHP <7.3)
I have a regex like this: /^(A-Za-z0-9)([\.\_]?[A-Za-z0-9-]+)(\.[A-Za-z]{2,6})+(\/A-Za-z+)*$/ and I want to test the string like: webmail.google.com.qqqqqqqqqqqqqqqqqqq....... But it shows TIMEOUT. I know that string is invalid for given regex. But I do this because when I input this string and ma...
Submitted by sam - 10 years ago
29

CSV line parsing

PCRE (PHP <7.3)
Captures all fields from a CSV file's line. Can be customized with user-defined field separator and protecting character.
Submitted by Various - 10 years ago
1

Get the command

ECMAScript (JavaScript)
Simply gets the command from a script command, automatically removes unwanted spaces.
Submitted by anonymous - 10 years ago
1

Simple script command and parameter grabber

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 10 years ago
1

Test for Ross

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
1

nginx log parser

Python
separate nginx log into database table-style fields
Submitted by wgzhao - 10 years ago
1...874875876877878...901

Community Library Entry

1

Regular Expression
Python

r"
^([^ ]*) - ([^ ]*) \[(.*)\] \"([^ ]*) ([^ ]*) ([^ ]*)\" (-|[0-9]*) (-|[0-9]*) \"(.+?|-)\" ([^ ]*|-) ([^ ]*|-) ([^ ]*|-) \"(.+?|-)\" \"(.+?|-)\" \"(.+?|-)\"$
"
Open regex in editor

Description

separate nginx log into database table-style fields

Submitted by wgzhao - 10 years ago