Regular Expressions 101

Explanation

Pro

^start of string

Negative Lookahead(?!.*(www|http|.com))

.*any character (except for line terminators), repeated any number of times

Group 1(www|http|.com)

1st Alternativewww

wwwthe literal text www (case sensitive)

2nd Alternativehttp

httpthe literal text http (case sensitive)

3rd Alternative.com

.any character (except for line terminators)

comthe literal text com (case sensitive)

.*any character (except for line terminators), repeated any number of times

$end of string, or before its final line terminator

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

^(?!.*(www|http|.com)).*$

New

test test.co test.other test.com

test test.co test.other test.com