Regular Expressions 101

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Library entries

-2
pcre

Simplify HTML

no description available
Submitted by LA - 8 years ago
-2
pcre

1

no description available
Submitted by anonymous - 8 years ago
-2
python

eee

no description available
Submitted by anonymous - 8 years ago
-2
pcre

get all href=()

no description available
Submitted by artyom lisovskij - 8 years ago
-2
python

link

no description available
Submitted by NTP-[SADAS] - 8 years ago
-2
pcre

e164_basic

e164_basic
Submitted by anonymous - 8 years ago
-2
pcre

IsEmailValid()

no description available
Submitted by anonymous - 8 years ago
-2
pcre

,,,

,,,
Submitted by ,,, - 8 years ago
-2
pcre

foo

no description available
Submitted by anonymous - 8 years ago
-2
python

five word capture

no description available
Submitted by anonymous - 8 years ago
-2
pcre

regex101

no description available
Submitted by anonymous - 8 years ago
-2
pcre

regex demo

no description available
Submitted by anonymous - 8 years ago
-2
pcre

Test post by e-mail

Description here
Submitted by Arief - 8 years ago
-2
python

python bracketed text

why doesn't this match text in brackets?
Submitted by anonymous - 8 years ago
-2
pcre

Name

no description available
Submitted by Alpha - 8 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

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Submitted by Mateon1 - 8 years ago