Regular Expressions 101

Sponsors

Library entries

6
pcre

Extract style

no description available
Submitted by anonymous - 7 years ago
6
pcre

Username:Password

Regex For finding username:password
Submitted by Ghost - 7 years ago
6
python

Find consecutive duplicate words

no description available
Submitted by anonymous - 7 years ago
7
python

CSS Import

no description available
Submitted by anonymous - 8 years ago
7
pcre

rsyslog test

global modifier
Submitted by dtmland - 7 years ago
7
python

repeat group match

no description available
Submitted by anonymous - 7 years ago
7
pcre

Any positive integer except zero

no description available
Submitted by Harsh - 7 years ago
8
pcre

Date time Advanced

no description available
Submitted by Mr.Neutro - 9 years ago

match valid JSON

Vote

26

Regular Expression
pcre

/
(?(DEFINE) # Note that everything is atomic, JSON does not need backtracking if it's valid # and this prevents catastrophic backtracking (?<json>(?>\s*(?&object)\s*|\s*(?&array)\s*)) (?<object>(?>\{\s*(?>(?&pair)(?>\s*,\s*(?&pair))*)?\s*\})) (?<pair>(?>(?&STRING)\s*:\s*(?&value))) (?<array>(?>\[\s*(?>(?&value)(?>\s*,\s*(?&value))*)?\s*\])) (?<value>(?>true|false|null|(?&STRING)|(?&NUMBER)|(?&object)|(?&array))) (?<STRING>(?>"(?>\\(?>["\\\/bfnrt]|u[a-fA-F0-9]{4})|[^"\\\0-\x1F\x7F]+)*")) (?<NUMBER>(?>-?(?>0|[1-9][0-9]*)(?>\.[0-9]+)?(?>[eE][+-]?[0-9]+)?)) ) \A(?&json)\z
/
x

Description

Loading markdown...
Submitted by Mateon1 - 8 years ago