Regular Expressions 101

Explanation

Pro

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://the literal text ://

Non-Capturing Group(?:[\w-]+\.)?

?repeats the group contents below at most once:

Character Class[\w-]+

+matches at least one character from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:facebook\.com|facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd\.onion)

1st Alternativefacebook\.com

facebookthe literal text facebook (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

2nd Alternativefacebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd\.onion

facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfydthe literal text facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

onionthe literal text onion (case sensitive)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

?repeats the group contents below at most once:

Negated Character Class[^#]*?

*?matches any number of characters outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

\#the literal # (35₁₀ / 43₈ / 23₁₆)

!/the literal text !/

1st Alternativevideo/video\.php

video/videothe literal text video/video (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

2nd Alternativephoto\.php

photothe literal text photo (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

3rd Alternativevideo\.php

videothe literal text video (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

4th Alternativevideo/embed

video/embedthe literal text video/embed (case sensitive)

5th Alternativestory\.php

storythe literal text story (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

6th Alternativewatch(?:/live)?/?

watchthe literal text watch (case sensitive)

Non-Capturing Group(?:/live)?

?repeats the group contents below at most once:

/livethe literal text /live (case sensitive)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Non-Capturing Group(?:.*?)

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

Non-Capturing Group(?:v|video_id|story_fbid)

1st Alternativev

vthe literal v (118₁₀ / 166₈ / 76₁₆) (case sensitive)

2nd Alternativevideo_id

video_idthe literal text video_id (case sensitive)

3rd Alternativestory_fbid

story_fbidthe literal text story_fbid (case sensitive)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

2nd Alternative[^/]+/videos/(?:[^/]+/)?

Negated Character Class[^/]+

/videos/the literal text /videos/ (case sensitive)

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

3rd Alternative[^/]+/posts/

4th Alternativegroups/[^/]+/permalink/

5th Alternativewatchparty/

2nd Alternativefacebook:

Group 1(\d+)

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

Unit Test Summary

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Quick Reference

26 tokens

Regular Expression

(?:https?://(?:[\w-]+\.)?(?:facebook\.com|facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd\.onion)/(?:[^#]*?\#!/)?(?:(?:video/video\.php|photo\.php|video\.php|video/embed|story\.php|watch(?:/live)?/?)\?(?:.*?)(?:v|video_id|story_fbid)=|[^/]+/videos/(?:[^/]+/)?|[^/]+/posts/|groups/[^/]+/permalink/|watchparty/)|facebook:)(\d+)

Unit Tests

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