regex101: Get favicon URL from HTML body

rel=the literal text rel= (case sensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:shortcut )?

?repeats the group contents below at most once:

shortcut the literal text shortcut (case sensitive)

iconthe literal text icon (case sensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

href=the literal text href= (case sensitive)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1([^?'"]+)

Negated Character Class[^?'"]+

+matches at least one character outside the set below:

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Character Class[?'"]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

'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

Search reference

Regular Expression

rel=['"](?:shortcut )?icon['"] href=['"]([^?'"]+)[?'"]

New

<link rel="shortcut icon" href="https://cdn.sstatic.net/Sites/stackoverflow/Img/favicon.ico?v=ec617d715196">
<link rel="icon" href="https://www.ecotechie.io/wp-content/uploads/2019/05/cropped-EcoTechie-Logo-512x512-1-32x32.png" sizes="32x32" />
<link rel="icon" href="//ssl.gstatic.com/pagespeed/insights/ui/logo/favicon_48.png" sizes="48x48">
<link rel='shortcut icon' href='https://cdn.sstatic.net/Sites/stackoverflow/Img/favicon.ico?v=ec617d715196'>

Regular Expressions 101

Regular Expression

Substitution