Regular Expressions 101

1st Alternative^(?:http|ftp)s?:\/\/([\w][^\/=\s]+)\/?

^start of line

Non-Capturing Group(?:http|ftp)

1st Alternativehttp

httpthe literal text http (case sensitive)

2nd Alternativeftp

ftpthe literal text ftp (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([\w][^\/=\s]+)

Character Class[\w]

\wany word character

Negated Character Class[^\/=\s]+

+matches at least one character outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\sany whitespace character

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative(^w{3}[\.\w][^\/\=\s]{2,})\/?

Group 2(^w{3}[\.\w][^\/\=\s]{2,})

^start of line

w{3}the literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive), repeated exactly 3 times

Character Class[\.\w]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\wany word character

Negated Character Class[^\/\=\s]{2,}

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

\sany whitespace character

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:http|ftp)s?:\/\/([\w][^\/=\s]+)\/?|(^w{3}[\.\w][^\/\=\s]{2,})\/?

Test String
New

www.google.com.edu-hjj+oio?/kjhkh.txt hjjh
https://calendar.google.com/calendar/render?tab=ic&pli=1#main_7

http://www.yahoo.comhttp://www.yahoo.co


www.foo.com.ui/=hjg.hhj
ggfhgfhfhf.uui
https://regex101.com/

Regular Expression

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Test String
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