regex101: PCRE2 (PHP) Match Workspace

Group 1(youtu.*be.*)

yoututhe literal text youtu (case sensitive)

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

bethe literal text be (case sensitive)

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(watch\?v=|embed\/|v|shorts|)

1st Alternativewatch\?v=

watchthe literal text watch (case sensitive)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

v=the literal text v= (case sensitive)

2nd Alternativeembed\/

embedthe literal text embed (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

3rd Alternativev

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

4th Alternativeshorts

shortsthe literal text shorts (case sensitive)

5th Alternative — matches an empty string

Group 3(.*?((?=[&#?])|$))

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

Group 4((?=[&#?])|$)

1st Alternative(?=[&#?])

Positive Lookahead(?=[&#?])

Character Class[&#?]

&the literal & (38₁₀ / 46₈ / 26₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

2nd Alternative$

$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

Search reference

Regular Expression

(youtu.*be.*)\/(watch\?v=|embed\/|v|shorts|)(.*?((?=[&#?])|$))

New

http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index
http://www.youtube.com/user/IngridMichaelsonVEVO#p/a/u/1/QdK8U-VIH_o
http://www.youtube.com/v/0zM3nApSvMg?fs=1&amp;hl=en_US&amp;rel=0
http://www.youtube.com/watch?v=0zM3nApSvMg#t=0m10s
http://www.youtube.com/embed/0zM3nApSvMg?rel=0
http://www.youtube.com/watch?v=0zM3nApSvMg
http://youtu.be/0zM3nApSvMg
https://youtube.com/shorts/0dPkkQeRwTI?feature=share
https://youtube.com/shorts/0dPkkQeRwTI

Regular Expressions 101

Regular Expression

Substitution