Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:(?!ab|cd)(.))+

+repeats the group contents below at least once:

Negative Lookahead(?!ab|cd)

1st Alternativeab

abthe literal text ab (case sensitive)

2nd Alternativecd

cdthe literal text cd (case sensitive)

Group 1(.)

.any character (except for line terminators)

$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.

25 tokens

Regular Expression

^(?:(?!ab|cd)(.))+$

New

This text won\'t match because it does contain ab in it!

This text won\'t match because it does contain cd in it!

This text matches because it doesn\'t contain them in itghdfgdfg!

Extraction

This text won\'t match because it does contain ab in it!

This text won\'t match because it does contain cd in it!

This text matches because it doesn\'t contain them in itghdfgdfg!