Regular Expressions 101

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Community Patterns

2

File filtering by extension

PCRE (PHP <7.3)
You would like to scan a folder containing many files (Example : *.pb, *.pbi, *.pbp and *.pbf) and you are interested only by two type of files (example : *.pb and *.pbi). This expression will match only if extension match (in this case *.pb and *.pbi) otherwise no reaction. Feel free to change file...
Submitted by StarBootics - 10 years ago
0

test

Python
test
Submitted by boag - 10 years ago
1

MySQLcase

Python
make sure mysql tables have the correct form
Submitted by d - 10 years ago
1

How to get various values within a pipe delimited string

PCRE (PHP <7.3)
We have a pipe delimited text file and each new record is separated by a CRLF. Each record has a fixed number of pipes, but not every column or field is valued, so there may be 2 or more pipes together. Is there a way to write a regex to parse out the third or fifth value? Many thanks in advance.
Submitted by Jon - 10 years ago
1

Chords

ECMAScript (JavaScript)
Expression to match a large amount of possible musical chords. From what I understand from musicians, the number of chords is basically infinite, but you will still find a certain scope being used freuently.
Submitted by A=B - 10 years ago
-2

Match website - http:|https://i.imgur.com

ECMAScript (JavaScript)
no description available
Submitted by ghrifter - 10 years ago
-2

Match Content-Range response header

ECMAScript (JavaScript)
Matches the Content-Range response header format -[end]/[total|*]
Submitted by mdezem - 10 years ago
1

phanindra.vaga.ranama

Python
sdf
Submitted by asdf - 10 years ago
2

Extract info from anime filename

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

Repeating Group

PCRE (PHP <7.3)
There are 2 segments within this data that start with REF* and end with a tilde (~). I can capture one of them but not both. I've read and cant seem to figure this one out. I DO need to preface with the NM1*03 piece.
Submitted by Chris. - 10 years ago
1

Parsing the response of an oauth provider for token and session

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

dropping first digit (2) andy advice?

PCRE (PHP <7.3)
\_\d(.+) for _2015041122
Submitted by jbt - 10 years ago
2

Gentoo atom parsing

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

list of comma separated dates in the form dd/mm/yyy

PCRE (PHP <7.3)
matches a list of comma separated dates in the form dd/mm/yyy. Between two dates must be only a comma. no other character are permitted: matches: 12/03/2011,23/19/1967 Doesn't match: 23/02/2010, 11/11/2011
Submitted by reario - 10 years ago
1

test

PCRE (PHP <7.3)
test
Submitted by test - 10 years ago
0

Matching lines that starts with -

PCRE (PHP <7.3)
It may be useful inorder to replace those lines with li
Submitted by Said Bakr - 10 years ago
2

suricata OSSIM regex-1

Python
no description available
Submitted by anonymous - 10 years ago
1

url

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

Get value from string

ECMAScript (JavaScript)
Used to get a value from a class e.g.: [...] class="font-12"[...] This regEx will receive "12" given the content of the class
Submitted by Gabriel R. Sezefredo - 10 years ago
0

Any mail address

PCRE (PHP <7.3)
Any mail address
Submitted by Himalay - 10 years ago
1...4546474849...902

Community Library Entry

1

Regular Expression
PCRE (PHP <7.3)

`
(?(DEFINE) (?<PROTOCOL>[^:/#?\s]+://) (?<LOGIN>[^:@/#?\s]+(?::[^@/#?\s]+)?@) (?<TEXT_DOMAIN>[^./#?\s-:]+(?:-[^./#?\s-:]+)?\.) (?<IP_DOMAIN> (?&NOT_RESERVED_IP) (?: (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\. ){3} (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?) ) (?<NOT_RESERVED_IP> (?!(?:1?0|224)(?:\.\d{1,3}){3}| (?:192\.168|172\.16)(?:\.\d{1,3}){2} ) ) (?<TLD>[^/#?\s.\d:-]+) (?<PORT>:\d{1,4}) (?<PATH>/(?:[^/\s&#?]*/?)+) (?<QUERY> \? (?: [^\s=]+(?:=[^&\s]*)? (?:&[^\s=]+(?:=[^&\s]*)?)* )? ) (?<HASH>\#.*) ) ^ (?&PROTOCOL) (?&LOGIN)? (?:(?&TEXT_DOMAIN)+(?&TLD)|(?&IP_DOMAIN)) (?&PORT)? (?&PATH)? (?&QUERY)? (?&HASH)? $
`
gmx
Open regex in editor

Description

Someone on IRC posted the following site: https://mathiasbynens.be/demo/url-regex which challgenged me to write a decent regex to match valid URLs in that list. This regex works in both pcre and javascript (you'll have to replace the pcre-specific syntax to make it work in JS).

Don't actually use this though, validate your URLs in a sane manner instead.

Submitted by Firas Dib - 10 years ago