Regular Expressions 101

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Regular Expression
PCRE2 (PHP >=7.3)

/
^(?:(?:2[0-4][0-9]|25[0-5]|1?[0-9]?[0-9])\.){3}(?:2[0-4][0-9]|25[0-5]|[0-1]?[0-9]?[0-9])$
/
gm
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Description

192.168.254.1 match 0.0.0.0 match 01.01.01.01 does not match 255.255.255.255 match 255.0.0.0 match 0.0.0.256 does not match

Submitted by nihuge - 3 years ago