Regular Expressions 101

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Community Patterns

1

fail2ban 0.8.13-1 Debian 8 Jessie Roundcube 1.1.5+dfsg.1-1~bpo8+1

Python
Filter authentication fails from /var/log/roundcube/error
Submitted by Daniel Bañobre Dopico el profe - 8 years ago
1

Username

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
1

^((?!^City$)[a-zA-Z '])+$

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
1

Letters Only

PCRE (PHP <7.3)
It checks the string to be only letters with no spaces or any other char than a-z and A-z
Submitted by anonymous - 8 years ago
1

Trim whitespaces regex

PCRE (PHP <7.3)
this is trim-like regex
Submitted by Giuseppe Tavella - 8 years ago
1

q

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1

test

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1

Search "contains" PHP conditions and replace

PCRE (PHP <7.3)
no description available
Submitted by Jan Barasek - 8 years ago
1

Cascade ID

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 8 years ago
0

Negative Lookahead

PCRE (PHP <7.3)
Negative Lookahead Sample
Submitted by TBU - 8 years ago
1

anchor from within html tags

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1

group german streetnames and streetnumbers

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1

hjkkk

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 8 years ago
1

Parse DocBlock tags

PCRE (PHP <7.3)
Parse DocBlock tags to name & value
Submitted by Jaanus Heeringson - 8 years ago
1

strct_separate_cart discount

PCRE (PHP <7.3)
Searching for instances of strct_separate_cart with discount as a member
Submitted by Carlos Vazquez - 8 years ago
1

End with digits

PCRE (PHP <7.3)
Checks if a string ends with digits
Submitted by Peter Krauß - 8 years ago
1

CohhCarnage giveaway started

PCRE (PHP <7.3)
no description available
Submitted by Me - 8 years ago
1

Citations

PCRE (PHP <7.3)
no description available
Submitted by Saranya - 8 years ago
1

A

PCRE (PHP <7.3)
Aa
Submitted by anonymous - 8 years ago
1

SQL Limit Clause

PCRE (PHP <7.3)
checks for valid limit clause of an sql statement
Submitted by Magesh Kumaar - 8 years ago
1...266267268269270...902

Community Library Entry

0

Regular Expression
PCRE (PHP <7.3)

/
%(?![0-9a-fA-F]{2})
/
Open regex in editor

Description

Negative Lookahead Sample

Submitted by TBU - 8 years ago