Regular Expressions 101

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Community Patterns

1

ConnectionStringServerDatabase

Python
Extract the server and database name from SQL Server connection string
Submitted by Davos - 9 years ago
0

detect if input is valid domain name

PCRE (PHP <7.3)
no description available
Submitted by nnnn20430 - 9 years ago
1

hastags shortcuts

PCRE (PHP <7.3)
This regexp is used in the SPIP cms for create tags fastly when you are writting a post.
Submitted by pierre.laszczak@gmail.com - 9 years ago
1

Atomic group

PCRE (PHP <7.3)
Atomic Groups are non-capturing and once a match is made will exit the atomic group and throw away all backtracks. Use Atomic Groups for optimising performance. A non-atomic expression \b(foobar|foot|foo)\b and a test string of foots will: match foo of foobar => fail and backtrack to the 2nd alter...
Submitted by anonymous - 9 years ago
1

Positive Look ahead and Look Behind

PCRE (PHP <7.3)
Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by Rajesh - 9 years ago
1

POSITIVE LOOK AHEAD AND POSITIVE LOOK BEHIND

PCRE (PHP <7.3)
Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by anonymous - 9 years ago
1

positive lookahead and positive lookbehind

PCRE (PHP <7.3)
Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...
Submitted by anonymous - 9 years ago
1

Positive lookahead

PCRE (PHP <7.3)
finds the first bar (Find "bar" which has "bar" after it)
Submitted by anonymous - 9 years ago
1

Polynomials regex

PCRE (PHP <7.3)
Decompose polynomials of type +/- NUMBERx ^ NUMBER
Submitted by anonymous - 9 years ago
1

dfrgeagtcer

PCRE (PHP <7.3)
regcergtecrhcethgeargerer
Submitted by regerhsrthrstchrtxhdrsxthjsrthrthrth - 9 years ago
1

Season and episode extractor

Python
extract form the name of a tvseries file the season ande episode
Submitted by 0b1w4n - 9 years ago
1

Match fluid-width-video-wrapper YouTube video

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

Regex for Youtube

PCRE (PHP <7.3)
Regex to catch youtube traffic in a Mikrotik router
Submitted by HMBE - 9 years ago
1

cuke-orderFills

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

1

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

C2I_BIO_2A_D1.2.02_21405520.txt

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
0

Date with format YYYY-MM-DD

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

Aggregates

Python
no description available
Submitted by anonymous - 9 years ago
1

2 or more space between text

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

php `define` match

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
1...574575576577578...711

Community Library Entry

40

Regular Expression
PCRE (PHP <7.3)

/
((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[.\!\/\\w]*))?)
/
ig
Open regex in editor

Description

A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.

Submitted by Matthew O'Riordan - 12 years ago