Regular Expressions 101

Pro

^start of line

Group 1((?:(?![\/?]).)*)

Non-Capturing Group(?:(?![\/?]).)*

*repeats the group contents below any number of times:

Negative Lookahead(?![\/?])

Character Class[\/?]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

.any character (except for line terminators)

Group 2(X00[A-Z0-9a-z]{7})

X00the literal text X00 (case sensitive)

Character Class[A-Z0-9a-z]{7}

{7}matches exactly 7 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

Group 3(.*)

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

$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.

26 tokens

^((?:(?![\/?]).)*)(X00[A-Z0-9a-z]{7})(.*)$

New

item :X00132BhJk

www.domain.com/X00132BhJk

www.domainsearch.com/search?ident=X00132BhJk

X00132BhJk

 X00132BhJk

$1<span class="context context_ident">$2</span>$3

item :X00132BhJk

www.domain.com/X00132BhJk

www.domainsearch.com/search?ident=X00132BhJk

X00132BhJk

 X00132BhJk