Regular Expressions 101

Group 1((http[s]?\:\/\/)|(ww(w|\d{1,3})\.))

1st Alternative(http[s]?\:\/\/)

Group 2(http[s]?\:\/\/)

httpthe literal text http (case sensitive)

Character Class[s]?

?matches at most one character from the set below:

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative(ww(w|\d{1,3})\.)

Group 3(ww(w|\d{1,3})\.)

wwthe literal text ww (case sensitive)

Group 4(w|\d{1,3})

1st Alternativew

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive)

2nd Alternative\d{1,3}

\d{1,3}a digit, repeated between 1 and 3 times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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.

Search reference

Regular Expression

((http[s]?\:\/\/)|(ww(w|\d{1,3})\.))

New

https://

www.
ww1.
ww11.
ww234.
ww12345.