Regular Expressions 101

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Library entries

0
pcre

User-Agent

Parser
Submitted by sn3kdev - 3 days ago
0
pcre

Parcing2

aa
Submitted by anonymous - 6 days ago
0
pcre

trim phone number

trim phone number
Submitted by anonymous - 6 days ago
0
dotnet

Match IPv4 Valid

expression to capture valid IP
Submitted by anonymous - 10 days ago
0
pcre

NMEA after timestamps

Picks up (most?) NMEA messages.
Submitted by David Harrison - 15 days ago
0
dotnet

Get h1-6 tag

(.*?)
Submitted by OlegBel - 20 days ago
0
dotnet

nick anme

mvp
Submitted by doppler - 25 days ago
0
pcre

decamelize

pascal case to snake case
Submitted by anonymous - a month ago
2
dotnet

Replace sub-strings in string

Replace sub-strings in string
Submitted by anonymous - a month ago
0
dotnet

fix plot histogram calls

k
Submitted by anonymous - a month ago
0
dotnet

French Insurance Number

French Insurance Number
Submitted by Dohts - a month 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

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Submitted by Mateon1 - 8 years ago