Regular Expressions 101

Group 1(cat)

catthe literal text cat (case insensitive)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(cat)

"I like to play with cats, as does Cathy, who is a member of ACATA, which is the American Cat And Tiger Association."

<em>$1</em>