regex101: PCRE (Legacy) Substitution Workspace

Non-Capturing Group(?:\G(?!\A)|<img)

1st Alternative\G(?!\A)

\Gstart of current search

Negative Lookahead(?!\A)

\Astart of string

2nd Alternative<img

<imgthe literal text <img (case sensitive)

Group with flags gxs(?s:.+?\bsrc=['"])

s modifier: single line. Allows a dot to match line terminators

.+?any character, repeated at least once

\ban ASCII word boundary

src=the literal text src= (case sensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

httpthe literal text http (case sensitive)

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

://the literal text ://

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

Positive Lookahead(?=/wp-content/)

/wp-content/the literal text /wp-content/ (case sensitive)

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Search reference

Regular Expression

(?:\G(?!\A)|<img)
(?s:.+?\bsrc=['"])\K
https?://.+?(?=/wp-content/)

New

<img 
src="https://www.example.com/de/wp-content/uploads/sites/1/2017/03/image.jpg"
data-srcset="
 https://www.example.com/de/wp-content/uploads/sites/1/2017/03/img1.jpg 507w,
 https://www.example.com/de/wp-content/uploads/sites/1/2017/03/img2.jpg 780w,
 https://www.example.com/de/wp-content/uploads/sites/74/2017/03/img3.jpg 950w"
data-sizes="
 (min-width: 80em) calc(0.5 * (100vw - (100vw- 57em))),
 (min-width: 48em) calc(0.5 * (100vw - 5em)),
 calc(100vw - 1em)"
alt="image" class="lazyload">

<img 
src="https://www.example.com/de/wp-content/uploads/sites/1/2017/03/image.jpg"
data-srcset="
 https://www.example.com/de/wp-content/uploads/sites/1/2017/03/img1.jpg 507w,
 https://www.example.com/de/wp-content/uploads/sites/1/2017/03/img2.jpg 780w,
 https://www.example.com/de/wp-content/uploads/sites/74/2017/03/img3.jpg 950w"
data-sizes="
 (min-width: 80em) calc(0.5 * (100vw - (100vw- 57em))),
 (min-width: 48em) calc(0.5 * (100vw - 5em)),
 calc(100vw - 1em)"
alt="image" class="lazyload">

Regular Expressions 101

Regular Expression

Extraction