/**
 * Search a string for a substring between $start and $end substrings
 */
function get_string_between($string, $start, $end, $inclusive = FALSE) {
    /* for convenience, we make our string start at position #1 */
    $string = ' ' . $string;
    
    $string = htmlentities($string);
    $start = htmlentities($start);
    $end = htmlentities($end);
    
    /* initial point = position of start delimiter */
    $ini = strrpos($string, $start);
    /* if start not found, return null */
    if ($ini == 0) {
        return "";
    }
    /* the actual initial point should just after the start delimiter */
    $ini += strlen($start);

    /* the length of the string we're seeking 
     * is distance between the start and end delimiters, minus the start delimiter's length 
     */
    $len = strrpos($string, $end, $ini) - $ini;

    /* if "inclusive" then tack the delims onto the found string */
    $ret = substr($string, $ini, $len);
    if ($inclusive) {
        $ret = $start . $ret . $end;
    }
    return html_entity_decode($ret);
}