Regular Expressions 101

Order By

Sponsors
There are currently no sponsors. Become a sponsor today!

Community Patterns

1

ok

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
-2

Roman numbers

ECMAScript (JavaScript)
This regex matches roman numbers from 1 (I) to 3999 (MMMCMXCIX)
Submitted by Nicolò Ribaudo - 9 years ago
1

Angler Exploit Kit

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

Date Validation

ECMAScript (JavaScript)
This pattern validates all the possible dates for all months in YYYY-MM-DD format. Due to limitations of regex it can not validate the dates of february for leap year. It will allow the date 29 for leap year too. Make sure to validate that yourself.
Submitted by Ashutosh Agrawal - 9 years ago
2

YouTube Iframe parser

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

BETWEEN clause

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
2

yowsup-cli message parsing

Python
This pattern parses the yowsup-cli message output to recover (otherwise lost) messages. Current yowsup version: v2.4
Submitted by kerel - 9 years ago
-2

Valid Email

ECMAScript (JavaScript)
Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+([-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}(-.{2,6})*;
Submitted by Fred Scales - 9 years ago
1

Valid Email

ECMAScript (JavaScript)
This is the javascript equivalent that .NET uses in their server-side validators.
Submitted by anonymous - 9 years ago
2

Markup link

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

Capture nested strings using recursion

PCRE (PHP <7.3)
Brackets, Parentheses, Braces, delimited
Submitted by anonymous - 9 years ago
1

check password

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
0

visa cvv

PCRE (PHP <7.3)
4003447582444271
Submitted by anonymous - 9 years ago
0

shankar g mirpuri social security number

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

rr filter

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

html img tag src

ECMAScript (JavaScript)
get src url from img tag in html
Submitted by anonymous - 9 years ago
1

simple labels

PCRE (PHP <7.3)
matches alphanumeric characters and apostrophes ex. Superman's Cape
Submitted by anonymous - 9 years ago
1

route53 export to bind format, moving TTL field

PCRE (PHP <7.3)
move TTL field from route53 zone export from right to left to "IN A/CNAME"
Submitted by shawn.puschnig@medialets.com - 9 years ago
1

Select all numbers greater than 36 (python)

Python
no description available
Submitted by Mansoor - 9 years ago
3

Select all number greater than 36

PCRE (PHP <7.3)
no description available
Submitted by Mansoor - 9 years ago
1...787788789790791...900

Community Library Entry

-2

Regular Expression
ECMAScript (JavaScript)

/
^(?!$)M{0,2}(?:M(?=CM(?:XC)?(?:IX)?$))?(?:C(?=M[^CD]*(?:XC)?[^CD]*$))?M?(?:C(?=D[^C]*(?:XC)?[^C]*$))?D?C{0,2}(?:C(?=XC(?:IX)?$))?(?:X(?=C[^X]*(?:IX)?[^X]*$)(?!.*L))?C?(?:X(?=L[^X]*(?:IX)?[^X]*$))?L?X{0,2}(?:X(?=IX$))?(?:I(?=[XV]$))?X?V?I{0,3}$
/
Open regex in editor

Description

This regex matches roman numbers from 1 (I) to 3999 (MMMCMXCIX)

Submitted by Nicolò Ribaudo - 9 years ago