WordPress at a glance

wp_extract_urls() WP 1.0

Use RegEx to extract URLs from arbitrary content.

✈ 1 time = 0.000114s = fast | 50000 times = 0.19s = very fast PHP 7.0.8, WP 4.6.1

No Hooks.

Return

Array. URLs found in passed string.

Usage

wp_extract_urls( $content );
$content(string) (required)
Content to extract URLs from.

Code of wp_extract_urls: wp-includes/functions.php VER 4.9.8

<?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 );
}

Related Functions

From tag: Link (URL)

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