Regular Expressions 101

Pro

Positive Lookbehind(?<=\bkey=")

\ban ASCII word boundary

key="the literal text key=" (case sensitive)

Positive Lookahead(?=.*-xyz(?=-|$))

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

-xyzthe literal text -xyz (case sensitive)

Positive Lookahead(?=-|$)

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative$

$end of line

abcdthe literal text abcd (case sensitive)

Non-Capturing Group(?:-[a-z]+)+

+repeats the group contents below at least once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Positive Lookahead(?=")

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

(?<=\bkey=")(?=.*-xyz(?=-|$))abcd(?:-[a-z]+)+(?=")

New

I found the key="abcd-qwer-qaa-xyz-vwxc" to salvation
I found the key="abcd-qwer-qaa-xy-vwxc" to salvation
I found the key="abc-qwer-qaa-xyz-vwxc" to salvation

Extraction

I found the key="abcd-qwer-qaa-xyz-vwxc" to salvation
I found the key="abcd-qwer-qaa-xy-vwxc" to salvation
I found the key="abc-qwer-qaa-xyz-vwxc" to salvation