Regular Expressions 101

Explanation
Pro

&atype=the literal text &atype= (case sensitive)

Group 1(\d+)

\d+a digit, repeated at least once

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.

25 tokens

&atype=(\d+)

New

bla'action=collect&atype=1',bla'action=collect&atype=3',bla'action=collect&atype=2',bla'action=collect&atype=1

bla'action=collect&atype=1',bla'action=collect&atype=3',bla'action=collect&atype=2',bla'action=collect&atype=1