Use RegEx to extract URLs from arbitrary content

If its necessary to extract all links from any text content - the next function will help in it:

/**
 * Use RegEx to extract URLs from arbitrary content.
 *
 * @since 3.7.0
 *
 * @param string $content Content to extract URLs from.
 * @return array URLs found in passed string.
 */
function wp_extract_urls($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);
}

/**

* Use RegEx to extract URLs from arbitrary content.

* @since 3.7.0

* @param string $content Content to extract URLs from.

* @return array URLs found in passed string.

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);

}

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Use RegEx to extract URLs from arbitrary content

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