static function generate_barcode($string='EXAMPLE', $convert='png', $enctype='code128b') {
$string = escapeshellarg($string);
$enctype = escapeshellarg($enctype);
static function generate_barcode($string='EXAMPLE', $convert='png', $enctype='code128b') {
$string = escapeshellarg($string);
$enctype = escapeshellarg($enctype);