regex101: PCRE (Legacy) Match Workspace

Positive Lookahead(?=(([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*)))

Group 1(([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)

1st Alternative([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+

Group 2([A-Za-z]{3,9}:(?:\/\/)?)

Character Class[A-Za-z]{3,9}

{3,9}matches between 3 and 9 characters from the set below:

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

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Non-Capturing Group(?:\/\/)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:[-;:&=\+\$,\w]+@)?

?repeats the group contents below at most once:

Character Class[-;:&=\+\$,\w]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\wany word character

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[A-Za-z0-9.-]+

+matches at least one character from the set below:

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

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

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+

Non-Capturing Group(?:www.|[-;:&=\+\$,\w]+@)

1st Alternativewww.

wwwthe literal text www (case insensitive)

.any character (except for line terminators)

2nd Alternative[-;:&=\+\$,\w]+@

Character Class[-;:&=\+\$,\w]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\wany word character

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[A-Za-z0-9.-]+

+matches at least one character from the set below:

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

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

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))

Non-Capturing Group(?:\/[\+~%\/.\w-_]*)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[\+~%\/.\w-_]*

*matches any number of characters from the set below:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\??optionally matches the literal ? (63₁₀ / 77₈ / 3F₁₆)

Non-Capturing Group(?:[-\+=&;%@.\w_]*)

Character Class[-\+=&;%@.\w_]*

*matches any number of characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\wany word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

#?optionally matches the literal # (35₁₀ / 43₈ / 23₁₆)

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

Character Class[\w]*

*matches any number of characters from the set below:

\wany word character

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

videothe literal text video (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

hdthe literal text hd (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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

(?=(([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))).*\/video\/hd\/.*

Test String
New

www.google.com/video/hd/hello
www.google.com/video/hd/
www.google.com/video/he/
Any string /video/hd/
www.google.com/anyurl

Regular Expression

Test StringNew

Test String
New