Regular Expressions 101

Community Patterns

5

ipv6

PCRE (PHP <7.3)
Match an ipv6 address
Submitted by Frusty - 7 years ago
9

only numbers

PCRE (PHP <7.3)
A string with only numbers in
Submitted by Gotts - 8 years ago

Don’t

0

Regular Expression
PCRE2 (PHP >=7.3)

/
^(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>0|[1-9]\d*)(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$
/
gm

Description

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Submitted by Hi - 5 months ago