Regular Expressions 101

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Community Patterns

6

Spanish DNI/NIE check fist pass

ECMAScript (JavaScript)
no description available
Submitted by Rafael Casanova Morera - 9 years ago
8

IP Address (with 0s)

ECMAScript (JavaScript)
Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255
Submitted by Ryan Plummer - 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
3

time format HH:mm

ECMAScript (JavaScript)
validates strings in time format HH:mm with hour in 24h format. only accepts up to 23:59
Submitted by Kelps Leite de Sousa - 9 years ago (Last modified a year ago)
4

html tags

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 9 years ago
6

Email

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 9 years ago
2

Regex tutorial Case sensitive consonants

PCRE (PHP <7.3)
With regex you can count the number of matches. Can you make it return the number of uppercase consonants (B,C,D,F,..,X,Y,Z) in a given string? E.g.: it should return 3 with the text ABcDeFO!. Note: Only ASCII. We consider Y to be a consonant! Example: the regex /./g will return 3 when run against t...
Submitted by anonymous - 4 years ago
1

PHP ReflectionParameter:__toString() parser

PCRE (PHP <7.3)
See http://www.php.net/manual/en/reflectionparameter.tostring.php
Submitted by Erin Millard - 12 years ago
-18

dd-mm-YYYY HH:mm:ss (year range 1000-2999)

PCRE (PHP <7.3)
Validate Gregorian calendar dates that contain 24-hour times. This will also correctly match the Feb 29 date when it falls on a valid leap year. Leap years occur every 4 years, with one exception: when a year is evenly divisible by 100 but not evenly divisible by 400, the year will not be a leap ye...
Submitted by Ka. - 12 years ago (Last modified a year ago)
0

DateTime: DD-MM-YYYY HH:mm:ss

PCRE (PHP <7.3)
Validate and Capture (in 1000-2999 range) Leap-Year Correct
Submitted by anonymous - 12 years ago
0

negated special characters

PCRE (PHP <7.3)
no description available
Submitted by Rimjhim - 11 years ago
2

sample

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 11 years ago
1

Replace second (or further) html statement in a whole code

ECMAScript (JavaScript)
This regex replace the second tag content which has the prefix ":". If you want to replace the third, just increase the statement {1} to {2}, and so go on.
Submitted by Caio Oliveira - 11 years ago
4

Task 1

PCRE (PHP <7.3)
Finds a happy smile, except sad one
Submitted by Kovalev Evgeny - 11 years ago
1

Select inside <a> tag

ECMAScript (JavaScript)
no description available
Submitted by Vinay - 11 years ago
1

Parse a HTML URL

Python
Break a URL into parts: protocol url path get parameters hash
Submitted by Dale O'Brien - 11 years ago
2

trim string

ECMAScript (JavaScript)
trim leading and trailing whitespace from a string
Submitted by Dave Atchley - 10 years ago
2

named group sample

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

Matching Multiline Strings in Large Text File

PCRE (PHP <7.3)
Need Help, Matching Multiline Strings in Large Text File
Submitted by jholderman - 10 years ago
3

php input:date yyyy-mm-dd

PCRE (PHP <7.3)
improved "Ahmed Z" regexp. PHP date format (and input[type=text] format date too): YYYY-MM-DD. Year between [1900-2099]. No leap year check. Month 02 is limited to 29 days.
Submitted by Oropesa - 10 years ago
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Community Library Entry

3

Regular Expression
ECMAScript (JavaScript)

/
^((?!666|000)[0-8][0-9\_]{2}\-(?!00)[0-9\_]{2}\-(?!0000)[0-9\_]{4})*$
/
gm
Open regex in editor

Description

tests for valid social security numbers according to the social security administration. more specifically: -disallows a group to have all 0s -disallows first group to have all 6s -disallows a ssn to begin with 9

note that this does not test for issued ssn's. that would be impossible to implement here, because the high group document is continuously updated on a monthly basis.

Submitted by noxToken - 9 years ago