Check link validity

Util.php

Class Util
{
    /**
     * Validates the given Link is broken or not
     *
     * Prerequisite
     *  - cUrl
     *
     * Conditions:
     *  - Valid if HTTP Status in (200,301, 302, 303, 307)
     *
     *  @author Mukesh Sharma
     *  @url    http://www.codezuzu.com/2015/03/how-to-validate-linkurl-in-php/
     *
     *  @return mixed Http Code If Valid Else False
     */
    static public function isValidLink($link)
    {
        $ch = curl_init($link);

        curl_setopt($ch,  CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch,  CURLOPT_HEADER, TRUE); // Include the headers
        curl_setopt($ch,  CURLOPT_NOBODY, TRUE); // Make HEAD request

        $response = curl_exec($ch);

        if ( $response === false ){
            // something went wrong, assume not valid
            return false;
        }

        $http_code   = curl_getinfo($ch, CURLINFO_HTTP_CODE);

        if (in_array($http_code, array(200, 301, 302, 303, 307)) === false) {
            // not a valid http code to asume success, link is not valid
            return false;
        }

        curl_close($ch); 

        return $http_code;
    }
}