CI_Trackback::convert_ascii PHP Метод

    public function convert_ascii($str)
    {
        $count = 1;
        $out = '';
        $temp = array();
        for ($i = 0, $s = strlen($str); $i < $s; $i++) {
            $ordinal = ord($str[$i]);
            if ($ordinal < 128) {
                $out .= $str[$i];
            } else {
                if (count($temp) === 0) {
                    $count = $ordinal < 224 ? 2 : 3;
                }
                $temp[] = $ordinal;
                if (count($temp) === $count) {
                    $number = $count === 3 ? $temp[0] % 16 * 4096 + $temp[1] % 64 * 64 + $temp[2] % 64 : $temp[0] % 32 * 64 + $temp[1] % 64;
                    $out .= '&#' . $number . ';';
                    $count = 1;
                    $temp = array();
                }
            }
        }
        return $out;
    }