regex101: regex link Facebook

1st Alternative(?<=profile\.php\?id\=)(?<id>[0-9]+)

Positive Lookbehind(?<=profile\.php\?id\=)

profilethe literal text profile (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

idthe literal text id (case sensitive)

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

Group id(?<id>[0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

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

2nd Alternative(?:(?<=\.com)|(?<=\.me)|(?<=\.co)|(?<=\.us))(?:(?:\/groups\/|\/)(?!profile\.php)(?<username>[\w\.\_]+))

Non-Capturing Group(?:(?<=\.com)|(?<=\.me)|(?<=\.co)|(?<=\.us))

1st Alternative(?<=\.com)

Positive Lookbehind(?<=\.com)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

2nd Alternative(?<=\.me)

Positive Lookbehind(?<=\.me)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

methe literal text me (case sensitive)

3rd Alternative(?<=\.co)

Positive Lookbehind(?<=\.co)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

cothe literal text co (case sensitive)

4th Alternative(?<=\.us)

Positive Lookbehind(?<=\.us)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

usthe literal text us (case sensitive)

Non-Capturing Group(?:(?:\/groups\/|\/)(?!profile\.php)(?<username>[\w\.\_]+))

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

1st Alternative\/groups\/

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

groupsthe literal text groups (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative\/

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negative Lookahead(?!profile\.php)

profilethe literal text profile (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phpthe literal text php (case sensitive)

Group username(?<username>[\w\.\_]+)

Character Class[\w\.\_]+

+matches at least one character from the set below:

\wany word character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\_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

Search reference

Regular Expression

(?<=profile\.php\?id\=)(?<id>[0-9]+)|(?:(?<=\.com)|(?<=\.me)|(?<=\.co)|(?<=\.us))(?:(?:\/groups\/|\/)(?!profile\.php)(?<username>[\w\.\_]+))

New

https://www.facebook.com/hung.le054
https://www.facebook.com/groups/j2team.community/?ref=nf_target&fref=nf&__xts__%5B0%5D=68.ARCufAkDYLfgBw09Ctl9HKUd8wMYIaATKYHE-9guWWpCGu86iH8k0p4Qx8BxlXEEJMW8shzzodIckx0qvnBg94kwMe3uOIPnjE9s6neoXwFX8kBJsWBpF-Ej8oXpGdiIu6sf9cg9tyeq&__tn__=C-R
https://www.facebook.com/NoExit.GoEXID/?hc_ref=ARQCFBLI4l-ciKCPEGazrn4_8WTxAulTr9a7XgMTgi_OKA_Iad1-hMzdD2z0snaq3BE&fref=nf&__xts__%5B0%5D=68.ARAUlT1DqV2wkn3VWI7belmtRn5k9XXk05WUw1Gl88lm2CDjGSmYX0zI_p8A19EG2w6iWF3t0gZN-GurkpGl05KGdS5Xv8lC__sOmlxD8Jz5CrhOjbz1ThvYtiZA3yzk4P66-V5BjDty&__tn__=kCH-R
https://www.facebook.com/profile.php?id=100010004806283&fref=pb&hc_location=friends_tab