Regular Expressions 101

Pro

1st Alternative(a(*SKIP)(*F)|b)

Group 1(a(*SKIP)(*F)|b)

1st Alternativea(*SKIP)(*F)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternativeb

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

2nd Alternative(c(*SKIP)(*F)|d)

Group 2(c(*SKIP)(*F)|d)

1st Alternativec(*SKIP)(*F)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternatived

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

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

(a(*SKIP)(*F)|b)|(c(*SKIP)(*F)|d)

New

ab
cd

ab
cd