Regular Expressions 101

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Community Patterns

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find all while ignoring a set of patterns

Python
This can be changed to find all characters upto a specific pattern as well by changing the \b at the start to a simple ^. This is useful if you want to limit your regex searches in a manner such that two pattern cases do not overlap (as regex does not currently handle overlap of cases when you cha...
Submitted by anonymous - 6 years ago
0

UK Postcodes

PCRE (PHP <7.3)
no description available
Submitted by Riaan Joubert - 6 years ago
0

Run Test UUID

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Message Log

Golang
no description available
Submitted by anonymous - 6 years ago
0

Patrón para coincidir con máscaras de red correctas

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Patrón para detectar direcciones IP correctas

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Match any UK Date

PCRE (PHP <7.3)
Finds any date in UK date format with or without century and allows for month names and abreviations as well as ordinal indicators (st, nd, rd, th) This expression uses look behind and look ahead to ensure the date is either at the start of a line or preceeded by whitspace.
Submitted by anonymous - 6 years ago
0

UK Full or Partial Postcode Validate, Match or Breakdown

PCRE (PHP <7.3)
Matches all standard UK postcodes whether partial (outward) or full (outward and inward), spaces optional. To enforce spaces remove the ? after (?:\s). There are a few letters not currently in use, this test does not seek to exclude them. The only known postcode this will not validate for is GIR 0A...
Submitted by anonymous - 6 years ago
0

ISO 8601 Date Format

ECMAScript (JavaScript)
Regex Matching ISO format
Submitted by anonymous - 6 years ago
0

Indicador Diario

Python
no description available
Submitted by anonymous - 6 years ago
0

Find doubled works

PCRE (PHP <7.3)
This is an adapted version of the regex writen at the book Mastering Reguar Expressions.
Submitted by maffei2443 - 6 years ago
0

A balanced email validation expression

PCRE (PHP <7.3)
This regex enforces the correct basic structure whilst only allowing permitted characters (RFC822) in both the local and domain parts. It permits + routing made popular by Gmail and allows for the + group to identified as routing. It allows all but the most extreme of valid email addresses i.e. "@" ...
Submitted by anonymous - 6 years ago
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Find links with images inside

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

PH4a

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Personal

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

regex for - near plot / over

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

regex for - near plot / over

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Incorporation

Python
Finds different variations of "Incorporation", e.g.: Inc, Inc. etc
Submitted by anonymous - 6 years ago
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Inc 2

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Corp 2

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
1...492493494495496...900

Community Library Entry

0

Regular Expression
PCRE (PHP <7.3)

/
^(?<local>[a-zA-Z0-9\.!#$%&'*\-\/=?^_`{|}~"]+)(?:\.)?(?<routing>[a-zA-Z0-9\.!#$%&'*\-\/=?^_`{|}~+"]*)(?:@)(?<domain>(?:[a-zA-Z0-9\-[\]]*)(?:\.)(?:[a-zA-Z0-9\-[\]\.]*))$
/
gm
Open regex in editor

Description

This regex enforces the correct basic structure whilst only allowing permitted characters (RFC822) in both the local and domain parts. It permits + routing made popular by Gmail and allows for the + group to identified as routing. It allows all but the most extreme of valid email addresses i.e. "@" at symbols contained in quotes. A cautionary note, just because RFC permits these characters you own mail server may not accept them all.

Submitted by anonymous - 6 years ago