Regular Expressions 101

Community Patterns

Fully Qualified Domain Name FQDN

0

Regular Expression
PCRE (PHP <7.3)

/
(?=^.{1,253}$)(^((?!-)[a-zA-Z0-9-]{1,63}(?<!-)\.)+[a-zA-Z]{2,63}$)
/

Description

Fully qualified domain name validation

Submitted by ximbs - 9 years ago