Regular Expressions 101

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Community Patterns

0

text has numbers

ECMAScript (JavaScript)
text has numbers
Submitted by vijay - a year ago
0

email matcher

PCRE2 (PHP >=7.3)
match some emails and extract their local part and domain
Submitted by dang duomg 191 - 6 months ago (Last modified 6 months ago)
1...900901902

Community Library Entry

-1

Regular Expression
PCRE (PHP <7.3)

/
^(255)\.(0|128|192|224|240|248|252|254|255)\.(0|128|192|224|240|248|252|254|255)\.(0|128|192|224|240|248|252|254|255)
/
gm
Open regex in editor

Description

Intended to verify a valid IPv4 subnet mask against every valid IPv4 subnet mask possible using octet format. Does not check against a string that is using CIDR notation.

Submitted by anonymous - 5 years ago