wp_extract_urls( string $content )

Use RegEx to extract URLs from arbitrary content.

Parameters

$content

(string) (Required) Content to extract URLs from.

Return

(array) URLs found in passed string.

Source

File: wp-includes/functions.php 

function wp_extract_urls( $content ) {
	preg_match_all(
		"#([\"']?)("
			. "(?:([\w-]+:)?//?)"
			. "[^\s()<>]+"
			. "[.]"
			. "(?:"
				. "\([\w\d]+\)|"
				. "(?:"
					. "[^`!()\[\]{};:'\".,<>«»“”‘’\s]|"
					. "(?:[:]\d+)?/?"
				. ")+"
			. ")"
		. ")\\1#",
		$content,
		$post_links
	);

	$post_links = array_unique( array_map( 'html_entity_decode', $post_links[2] ) );

	return array_values( $post_links );
}

Expand Source Code View on GitHub

Related

Used By

Used By
Used By Description
wp-includes/comment.php: pingback()

Pings back the links found in a post.
wp-includes/functions.php: do_enclose()

Check content for video and audio links to add as enclosures.

Changelog

Changelog
Version Description
WP-3.7.0 Introduced.