Regular Expressions 101

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5
pcre

URL

URL Description from Dr. M. G. @ Brookes
Submitted by anonymous - 7 years ago
5
pcre

Latitude,Longitude fetcher

Useful to work with GoogleMap API.
Submitted by anonymous - 7 years ago
5
pcre

ipv6

Match an ipv6 address
Submitted by Frusty - 6 years ago
6
pcre

ID003 device info

no description available
Submitted by sasjaq - 8 years ago
6
pcre

json

{1:aa,2:bb,3:"aa:bb"}
Submitted by suat & umut - 8 years ago
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

match valid JSON

Vote

23

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

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Submitted by Mateon1 - 8 years ago