Add showhide shortcode via PHP

Hi,

Is it possible to add the showhide shortcode via PHP? At this moment I use:

$string = ”;

$shortcode = ‘showhide type=”post” more_text=”More” less_text=”Less”‘;
$string .= do_shortcode(‘[‘.$shortcode.’]’);

$string .= ‘TEXT’;

$shortcode2 = “/showhide”;
$string .= do_shortcode(‘[‘.$shortcode2.’]’);

return($string);

The firdt shortcode is recognized just fine, but then it goes wrong :-(:

More
TEXT[/showhide]

Any ideas?

Kind regards,

Martijn