regex101: PCRE2 (PHP) Match Workspace

Pro

Positive Lookbehind(?<=<a)

<athe literal text <a (case sensitive)

Non-Capturing Group(?:.(?!<\/a>))*?

*?repeats the group contents below any number of times:

.any character (except for line terminators)

Negative Lookahead(?!<\/a>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

a>the literal text a> (case sensitive)

class="the literal text class=" (case sensitive)

Group 1([^"]*)

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"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

25 tokens

Regular Expression

(?<=<a)(?:.(?!<\/a>))*?class="([^"]*)

<a href="https://lac.wetlands.org/" class="com-link" target="_blank"><mark class="hl_yellow"><b>Fundación Humedales/Wetlands International:</b></mark></a><mark class="hl_yellow"><b> </b></mark><a href="https://twitter.com/fundachumedales?lang=en" class="com-link" target="_blank">Twitter </a>/ <a href="https://es-la.facebook.com/fundacion.humedales/" class="com-link" target="_blank">Facebook</a> / Instagram. Por el Día de los Humedales, junto al Museo Scasso lanzó <a href="https://www.youtube.com/watch?v=xl0lgozO_HU&amp;feature=youtu.be" class="com-link" target="_blank">este video</a>