Regular Expressions 101

^start of line

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

?repeats the group contents below at most once:

Negated Character Class[^:\n]+

+matches at least one character outside the set below:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

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

://the literal text ://

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

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

?repeats the group contents below at most once:

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

*?repeats the group contents below any number of times:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^/\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^/.\n]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\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.

Search reference

Regular Expression

^(?:[^:\n]+://)?[^/\n]+(?:(?:/[^/\n]+)*?/[^/.\n]+)?$

New

www.mysite.com
http://www.example.com
www.mysite.com/page
http://www.mysite.com/doc1/doc2/page
http://www.mysite.com/page/
http://www.mysite.com/dir1/dir2/file.php
http://www.mysite.com/file.jpg
www.mysite.com/file.html
www.mysite.com/file.doc

Extraction