Regular Expressions 101

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Community Patterns

1

Password Security and Validation

PCRE (PHP <7.3)
A password regex that has to have at least 1 uppercase caracter, 1 lowercase caracter, 1 special caracter and a digit
Submitted by MestreMurai - 9 years ago
1

validate 14,9 decimals

PCRE (PHP <7.3)
validate 14,9 decimals
Submitted by Ganey - 9 years ago
1

Find label tags without for attributes

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

Giphy ID Regex

PCRE (PHP <7.3)
Get the ID from the multiple Giphy URLs
Submitted by anonymous - 9 years ago
1

.Net

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

header-tags

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

Title Case deliminator split

PCRE (PHP <7.3)
Splits words for title casing; $0[0].toUpperCase(); `
Submitted by anonymous - 9 years ago
1

fasting range

PCRE (PHP <7.3)
Find fasting range in lab result text
Submitted by geoff - 9 years ago
1

result range

PCRE (PHP <7.3)
Find range in lab result text
Submitted by geoff - 9 years ago
1

Match all files in root dir

Python
Intended for use on a webserver. Only matches files in / and excludes files, whcih could be in subfolders (/myfile).
Submitted by rugk (rugk <at> posteo.de) - 9 years ago
1

bb-*

PCRE (PHP <7.3)
aaa
Submitted by wyj - 9 years ago
1

matching foramt ,xxx:

Python
for dictionary
Submitted by anonymous - 9 years ago
1

test

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

Comienzo de string

PCRE (PHP <7.3)
Señala el comienzo de un string en modo multilinea
Submitted by Juan Miguel - 9 years ago
1

Add a string to a comma-separated list if not already in list

PCRE (PHP <7.3)
matches only lines that do not contain the string uses negative look arounds appends the new item always to the back suffers from a leading comma in case the list was empty
Submitted by @ubunatic - 9 years ago
1

Проверка повтора слов

PCRE (PHP <7.3)
От начала строки, разделенных пробелом
Submitted by DocSS - 9 years ago
1

match url

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

Compare two comma separated 4-digit years (first must be greater)

PCRE (PHP <7.3)
Compares two comma separated 4-digit years, and if the first one is greater, a match is returned. AUTHOR: Wiktor Stribizew SO PRofile: http://stackoverflow.com/users/3832970/wiktor-stribi%C5%BCew
Submitted by Wiktor Stribizew - 9 years ago
1

before or equal to 12:35pm

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

match anything before 19-35pm

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

1

Regular Expression
PCRE (PHP <7.3)

/
^(text[ ]*=[ ]*)'((?(?!item_1[,]?).)*)'
/
gm
Open regex in editor

Description

  • matches only lines that do not contain the string
  • uses negative look arounds
  • appends the new item always to the back
  • suffers from a leading comma in case the list was empty
Submitted by @ubunatic - 9 years ago