wp_extract_urls( string $content ): string[]

835function wp_extract_urls( $content ) {836	preg_match_all(837		"#([\"']?)("838			. '(?:([\w-]+:)?//?)'839			. '[^\s()<>]+'840			. '[.]'841			. '(?:'842				. '\([\w\d]+\)|'843				. '(?:'844					. "[^`!()\[\]{}:'\".,<>«»“”‘’\s]|"845					. '(?:[:]\d+)?/?'846				. ')+'847			. ')'848		. ")\\1#",849		$content,850		$post_links851	);852 853	$post_links = array_unique(854		array_map(855			static function ( $link ) {856				// Decode to replace valid entities, like &amp;.857				$link = html_entity_decode( $link );858				// Maintain backward compatibility by removing extraneous semi-colons (`;`).859				return str_replace( ';', '', $link );860			},861			$post_links[2]862		)863	);864 865	return array_values( $post_links );866}