Regular Expressions 101

Pro

ytthe literal text yt (case sensitive)

Group ytVer(?<ytVer>[a-z])

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Group ytID(?<ytID>[a-zA-Z0-9-_]{8,11})

Character Class[a-zA-Z0-9-_]{8,11}

{8,11}matches between 8 and 11 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

Regular Expression

yt(?<ytVer>[a-z])(?<ytID>[a-zA-Z0-9-_]{8,11})

New

https://www.youtube.com/watch?v=f7dWJcJgEjE?list
https://youtu.be/voceyAq-R9E
https://www.youtube.com/embed/f7dWJcJgEjE
https://youtu.be/watch?v=DKbQFMOEFTs

ytaDKbQFMOEFTs
ytzvoceyAq-R9E

Substitution

https://www.youtube.com/watch?v=f7dWJcJgEjE?list
https://youtu.be/voceyAq-R9E
https://www.youtube.com/embed/f7dWJcJgEjE
https://youtu.be/watch?v=DKbQFMOEFTs

ytaDKbQFMOEFTs
ytzvoceyAq-R9E