Regular Expressions 101

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Library entries

103
javascript

trim

trim string
Submitted by fp - 9 years ago
37
pcre

http://

no description available
Submitted by Mitus M. - 8 years ago
33
javascript

IP Address validator

Validates IPv4 IP Address
Submitted by krzysp - 7 years ago
31
pcre

ninite

no description available
Submitted by peek - 7 years ago
30
javascript

Email address (most used)

Email address, most used cases
Submitted by Jago - 7 years ago
27
pcre

Wrap long string to spec length

no description available
Submitted by fullpipe - 9 years ago
22
pcre

userName

1-15 alphanumeric login name
Submitted by gsanchezc - 7 years ago

Credit Card Match

Vote

0

Regular Expression
pcre

/
(?<!\w)((?<visa>4\d{3}([\ -]?\d{4})(?3)(?3)([\s-]?\d{3})?)|(?<mastercard>(?:5[1-5]\d{2}|222[1-9]|22[3-9]\d|2[3-6]\d{2}|27[01]\d|2720)(?3)(?3)(?3))|(?<amex>3[47]\d{2}([\s-]?\d{5})\d(?7))|(?<discover>6(?:011|[45]\d{2}|22[1-9]|2[4-6]\d|28[2-8])(?3)(?3)(?3)(?:\d{1,3})?)|(?<dc>3(?:[68-9]\d{2}|095|0[0-5]\d)(?:([\s-]?\d{6})|(?3)(?3))(?3)(?4)?)|(?<jcb>35[2-8]\d(?3)(?3)(?3)(?4)?)|(?<dankort>5019(?3)(?3)(?3))|(?<other>(?:5[06-9]\d{2}|5[6-9]\d{2}|6[0-9]\d{2})(?:(?3)(?3)(?3)(?4)?|(?10)(?7))))(?!\w)
/
gm

Description

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Submitted by anonymous - 2 years ago