Regular Expressions 101

Group 1(.*\.)?

?repeats the group contents below at most once:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

somedomainthe literal text somedomain (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

com:8000the literal text com:8000 (case sensitive)

Group 2([\/?#&].*)

Character Class[\/?#&]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

customthe literal text custom (case sensitive)

.any character (except for line terminators)

cssthe literal text css (case sensitive)

$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.

Search reference

Regular Expression

(.*\.)?somedomain\.com:8000([\/?#&].*)custom.css$

New

https://somedomain.com:8000/s/asdfsadfsadf/asdfsdfsad/custom.css
http://somedomain.com:8000/s/asdfsadfsadf/asdfsdfsad/custom.css
http://somedomain.com:8000/s/asdfsadfsadf/asdfsdfsad/hello.html

Regular Expression

Extraction