Regular Expressions 101

Group 1( *?https{0,1}:\/\/w{0,3}.*| *?ftp:\/\/w{0,3}.*| *?\n)

1st Alternative *?https{0,1}:\/\/w{0,3}.*

*?the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

httpthe literal text http (case sensitive)

s{0,1}optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

w{0,3}the literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive), repeated between 0 and 3 times

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

2nd Alternative *?ftp:\/\/w{0,3}.*

*?the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

ftp:the literal text ftp: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

w{0,3}the literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive), repeated between 0 and 3 times

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

3rd Alternative *?\n

*?the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\na line-feed (newline) character (ASCII 10)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

( *?https{0,1}:\/\/w{0,3}.*| *?ftp:\/\/w{0,3}.*| *?\n)

New

http://www.abcd.com.br
https://pt.stackoverflow.com/questions/79908/validar-url-express%C3%A3o-regular
ftp://algumacoisa.aqui.jap
eu não sou uma URL
ftp://www. eu tenho espaços em branco . com

Extraction

http://www.abcd.com.br
https://pt.stackoverflow.com/questions/79908/validar-url-express%C3%A3o-regular
ftp://algumacoisa.aqui.jap
eu não sou uma URL
ftp://www. eu tenho espaços em branco . com