Regular Expressions 101

^start of line

Non-Capturing Group(?:(http|https):\/\/[a-zA-Z-]*\.{0,1}[a-zA-Z-]{3,}\.[a-z]{2,})

Group 1(http|https)

1st Alternativehttp

httpthe literal text http (case sensitive)

2nd Alternativehttps

httpsthe literal text https (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-zA-Z-]*

*matches any number of 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)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.{0,1}optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zA-Z-]{3,}

{3,}matches at least 3 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)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,}

{2,}matches at least 2 characters from the set below:

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

channelthe literal text channel (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([a-zA-Z0-9_]{3,})

Character Class[a-zA-Z0-9_]{3,}

{3,}matches at least 3 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 _ (95₁₀ / 137₈ / 5F₁₆)

$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.

25 tokens

Regular Expression

^(?:(http|https):\/\/[a-zA-Z-]*\.{0,1}[a-zA-Z-]{3,}\.[a-z]{2,})\/channel\/([a-zA-Z0-9_]{3,})$

New

https://www.youtube.com/channel/UCAoMPWcQKA_9Af5YhWdrZgw

https://www.youtube.com/channel/UCAoMPWcQKA_9Af5YhWdrZgw