Regular Expressions 101

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Library entries

2
pcre

Repetitions

More than three words repeated in 3.
Submitted by paconaranjo - 8 years ago
1
python

Path to devices

no description available
Submitted by Airam - 8 years ago
-3
pcre

British Postcode Check

no description available
Submitted by guest - 8 years ago
-3
pcre

british postcode check

no description available
Submitted by anonymous - 8 years ago
0
pcre

some shit

find all js link on page source
Submitted by hobot - 8 years ago
-2
pcre

1_aa3

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

42 post regex

Hosts regex for 42 school (france)
Submitted by Kerosene2000 - 8 years ago
-3
javascript

111

no description available
Submitted by anonymous - 8 years ago
-3
javascript

111

no description available
Submitted by anonymous - 8 years ago
-3
javascript

1111

no description available
Submitted by anonymous - 8 years ago
1
pcre

phone test

no description available
Submitted by cool guy - 8 years ago
6
python

CSS Import

no description available
Submitted by anonymous - 8 years ago

match valid JSON

Vote

22

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 - 7 years ago