Regular Expressions 101

<imgthe literal text <img (case insensitive)

\ban ASCII word boundary

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

\ban ASCII word boundary

src=the literal text src= (case insensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negative Lookahead(?!https?:\/\/img\.[a-z0-9]*\.test\/)

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)

imgthe literal text img (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z0-9]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

testthe literal text test (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([^'"]*)

Negated Character Class[^'"]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<img\b.*?\bsrc=['"](?!https?:\/\/img\.[a-z0-9]*\.test\/)([^'"]*)

New

<img alt='' src='http://img.dev.teeeest/images/UID' />
<img alt='' src='https://img.deaaav.test.com/images/UID/' />
<img alt='' src='http://api.com/images/UID' />
<img alt='' src='http://img.deaSassav.test/images/UID' />
<img alt='' src='https://img.dev.test/images/UID' />