Regular Expressions 101

^start of line

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[a-zA-Z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:,\s*@[a-zA-Z0-9]+)*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[a-zA-Z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^@[a-zA-Z0-9]+(?:,\s*@[a-zA-Z0-9]+)*$

New

@tag1,@tag2
@tag1, @tag2
@tag1

@tag 1
@tag    1, @t a g2
@t ag       1, @tag 2
@tag1,          @    tag sdf-sdf
@tag 1,    @ tag2 

tag  acb