Regular Expressions 101

Community Patterns

Community Library Entry

0

Regular Expression
PCRE (PHP <7.3)

/
@[[:word:]](?:(?:[[:word:]]|(?:\.(?!\.))){0,28}(?:[[:word:]]))?
/
gmu

Description

Handles single letter usernames, initial / trailing / consecutive periods, max length of 30 letters.

Submitted by anonymous - 6 years ago