Regular Expressions 101

Group 1(https?:\/\/)

httpthe literal text http (case insensitive)

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^.]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(example\.to\/images\/)

examplethe literal text example (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

tothe literal text to (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

imagesthe literal text images (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

thumbthe literal text thumb (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3(.+)

.+any character (except for line terminators), repeated at least once

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(https?:\/\/)[^.]+\.(example\.to\/images\/)thumb\/(.+)

New

http://x1.example.to/images/thumb/50/157/1571552600.jpg
http://x2.example.to/images/thumb/50/120/1201859695.jpg
http://x3.example.to/images/thumb/50/210/2109983330.jpg

Substitution

$1$2full/$3