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Force WordPress `srcset` to HTTPS
/*
* Force URLs in srcset attributes into HTTPS scheme.
* This is particularly useful when you're running a Flexible SSL frontend like Cloudflare
*/
function ssl_srcset( $sources ) {
foreach ( $sources as &$source ) {
$source['url'] = set_url_scheme( $source['url'], 'https' );
}
return $sources;
}
add_filter( 'wp_calculate_image_srcset', 'ssl_srcset' );
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