Regular Expressions 101

Explanation

Pro

^start of line

http:the literal text http: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

*repeats the group contents below any number of times:

Negated Character Class[^\/\n]*

*matches any number of characters outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\na line-feed (newline) character (ASCII 10)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

googlethe literal text google (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

Non-Capturing Group(?:\/[^\n]*)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^\n]*

*matches any number of characters outside the set below:

\na line-feed (newline) character (ASCII 10)

$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

^http:\/\/(?:[^\/\n]*\.)*google\.com(?:\/[^\n]*)?$

New

http://test.google.com/
http://google.com/
http://test.google.com
http://.google.com/
http://one.more.test.google.com

http://test.google.com/
http://google.com/
http://test.google.com
http://.google.com/
http://one.more.test.google.com