Regular Expressions 101

Explanation

Pro

Group 1(\w+)

\w+any word character, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

"?optionally matches the literal " (34₁₀ / 42₈ / 22₁₆)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

Group 2((?(?<=")[^"]*|\w*))

Condition(?(?<=")[^"]*|\w*)

Uses the first branch if the lookaround matches

Positive Lookbehind(?<=")

"the literal " (34₁₀ / 42₈ / 22₁₆)

If the condition is true, match this branch:[^"]*

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

Otherwise, match this branch:\w*

\w*any word character, repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(\w+):"?\K((?(?<=")[^"]*|\w*))

tag:videos will extract videos

tag:"my videos" will extract my videos

riding ponies tag:ponies will extract ponies

riding ponies tag:"pony rider" will extract pony rider

riding ponies tag: will extract nothing

travelling the world tag:"aussie guy" country:Australia

Substitution

tag:videos will extract videos

tag:"my videos" will extract my videos

riding ponies tag:ponies will extract ponies

riding ponies tag:"pony rider" will extract pony rider

riding ponies tag: will extract nothing

travelling the world tag:"aussie guy" country:Australia