Regular Expressions 101

Community Patterns

1

verificador de e-mail

PCRE2 (PHP >=7.3)
email
Submitted by almlt24 - 13 minutes ago
1

pmsa_docx_replace

PCRE2 (PHP >=7.3)
pmsa_docx_replace
Submitted by anonymous - a day ago
1

http(s) address

PCRE2 (PHP >=7.3)
simple http(s) patter
Submitted by lhotakj - a day ago
1

my

PCRE2 (PHP >=7.3)
replace first line and second
Submitted by MH - 3 days ago
1

Parser

PCRE2 (PHP >=7.3)
for mail
Submitted by anonymous - 5 days 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

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Submitted by Mateon1 - 9 years ago