chamilo / chamilo-lms

    }

    // Search the filepath of all detected <a href> tags

    if (sizeof($tag_list) > 0) {

        $file_path_list = array();

        $href_list = array();

        foreach ($tag_list as & $this_tag) {

            /* Match case insensitive, the stuff between the two ~ :

                a href = <exactly one quote><one or more non-quotes><exactly one ">

                e.g. a href="www.google.be", A HREF =   "info.html"

                to match ["] escape the " or else PHP interprets it

                [\"]{1} --> matches exactly one "

                +	1 or more (like * is 0 or more)

                [\s]* matches whitespace

                $matches contains captured subpatterns

                the only one here is ([^\"]+) --> matches[1]

            */

            if (preg_match("~a href[\s]*=[\s]*[\"]{1}([^\"]+)[\"]{1}~i", $this_tag, $matches)) {

                $file_path_list[] = $matches[1]; // older

                $href_list[] = $matches[0]; // to also add target="_self"

            }

        }

    }

    // Replace the original hyperlinks by the correct ones

    for ($count = 0; $count < sizeof($href_list); $count++) {

    // Search the filepath of parameter $param_name in all detected tags

    if (sizeof($tag_list) > 0) {

        $file_path_list = array();

        $href_list = array();

        foreach ($tag_list as & $this_tag) {

            //Display::display_normal_message(htmlentities($this_tag)); //debug

            if ( preg_match("~".$param_name."[\s]*=[\s]*[\"]{1}([^\"]+)[\"]{1}~i", $this_tag, $matches)) {

                $file_path_list[] = $matches[1]; // older

                $href_list[] = $matches[0]; // to also add target="_self"

            }

        }

    }

    // Replace the original tags by the correct ones