Regular Expressions 101

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Community Patterns

1

Recursive search

PCRE (PHP <7.3)
Proof of concept to omit restriction with '' http://stackoverflow.com/questions/15584634/about-php-regexp-for-recursive-pattern?answertab=oldest#tab-top http://stackoverflow.com/questions/25408579/regex-to-match-blocks-inside-blocks
Submitted by themroc - 10 years ago
1

Recursive search

PCRE (PHP <7.3)
Proof of concept to omit restriction with '' http://stackoverflow.com/questions/15584634/about-php-regexp-for-recursive-pattern?answertab=oldest#tab-top http://stackoverflow.com/questions/25408579/regex-to-match-blocks-inside-blocks
Submitted by themroc - 10 years ago
2

Match number in html

ECMAScript (JavaScript)
Prevent matching in markup attributes
Submitted by Mathieu Civel - 10 years ago
2

SFTP or FTP url

PCRE (PHP <7.3)
Parse an SFTP or FTP url and brak it into named capture groups.
Submitted by Cullen Johnson - 10 years ago
13

regex101.com id grabber

PCRE (PHP <7.3)
grabs the ID for the regex101.com permalink to code
Submitted by chris mccoy - 10 years ago
1

Matching url

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

Demo

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

Escape non-Ascii Character

PCRE (PHP <7.3)
Replace non-ascii characters with empty spaces.
Submitted by Huchister - 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
0

too greedy +

PCRE (PHP <7.3)
I would like to make that pattern match word char followed by plus folowed by few word chars and followed by another word char and plus. Both word chars followed by plus have to be optional. The problem is that + in middle part takes as much chars as it can and last part never matches (for example s...
Submitted by Nel - 10 years ago
-1

Find html tag opening for tag with specific class.

PCRE (PHP <7.3)
I needed a regex to find the opening location of an html tag with a specific class. It is ugly, and it relies on many false assumtions, yet be honest, this will work in most cases. Also checks if the tag is in a line that is commented out. Again, we wont know if it is commented out if it is done on ...
Submitted by Stack overflow Superspy - 10 years ago
1

foobar

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 10 years ago
6

json

PCRE (PHP <7.3)
{1:aa,2:bb,3:"aa:bb"}
Submitted by suat & umut - 10 years ago
1

json

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

auie

Python
auie
Submitted by auie - 10 years ago
-2

Regex for 1 to 100 with or without decimal values

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

Match Ice Faces Empty RTF

PCRE (PHP <7.3)
Will match any empty or containing whitespace only Ice Faces Rich Text Input element.
Submitted by Sam Blumire - 10 years ago
-2

Basic grammar for regex matching of simplistic Makefiles

Python
This expression should both normal and wildcard targets and rules wrapped in simple sub-shell or varriable substitution enclosures.
Submitted by Robert Butler <me@r-butler.net> - 10 years ago
0

Solved:Retrieve Value from JSON /(?<="signature":")[^"]+

PCRE (PHP <7.3)
I posted in Stackoverflow asking for help in regexp to retrieve value from a JSON response: {"payload":"eyJjaGFsbGVuZ2UiOiIwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAiLCJtaW5pbXVtTW9iaWxlVmVyc2lvbiI6MSwibm9uY2UiOiJPQ1dwdjkzSzRMSCtQM0...
Submitted by Pratap Venkatesan - 10 years ago
1

Trim

PCRE (PHP <7.3)
Popular trim Regular Expression. Matches whitespace characters at the beginning and end of a string. Check out the usage examples in the test string to see how you can implement it into your own code.
Submitted by Shawn G. - 10 years ago
1...880881882883884...900

Community Library Entry

-1

Regular Expression
PCRE (PHP <7.3)

/
^(?:(?<!\/\/|\/\*|<!--).)* #check if commented out <[a-z][a-z0-9]*?\b #find start of a tag (?:.(?![^?]>))+ #Must not find > between start and class unless ?> class=(["']) #Find class and opening quotes (?:(?!\1).)* \bmatch\b (?:(?!\1).)* #see if our tag is in between the quotes \1 #closing quotes .*(?<!\?)> #find first > without ? in front of it
/
gmUix
Open regex in editor

Description

I needed a regex to find the opening location of an html tag with a specific class. It is ugly, and it relies on many false assumtions, yet be honest, this will work in most cases. Also checks if the tag is in a line that is commented out. Again, we wont know if it is commented out if it is done on another line, yet in most cases this will work.

Submitted by Stack overflow Superspy - 10 years ago