Regular Expressions 101

Community Patterns

7

rsyslog test

PCRE (PHP <7.3)
global modifier
Submitted by dtmland - 9 years ago
23

userName

PCRE (PHP <7.3)
1-15 alphanumeric login name
Submitted by gsanchezc - 9 years ago
35

http://

PCRE (PHP <7.3)
no description available
Submitted by Mitus M. - 10 years ago
18

Email validation

PCRE (PHP <7.3)
no description available
Submitted by tutsplus.com - 9 years ago
16

Alphanumeric Regex

PCRE (PHP <7.3)
no description available
Submitted by Deepan - 9 years ago

match valid JSON

26

Regular Expression
PCRE (PHP <7.3)

/
(?(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 - 9 years ago