function qrcode_output_func( $atts, $content = null ) {
extract( shortcode_atts( array(
'size' => '150',
'errorlv' => 'L',
), $atts ));
if ( "" == $content ) {
$content = get_permalink();
}
return '<img src="http://chart.apis.google.com/chart?chs=' . $size . 'x' . $size . '&cht=qr' . '&chld=' . $errorlv . '&chl=' . rawurlencode($content) . '">';
}
add_shortcode( 'qrcode', 'qrcode_output_func' );