Question

Simple example of a shortcode:

function s_print( $atts ){
    return 'http://abc.com/?foo=1&bar=2';
}
add_shortcode( 'my_shortcode', 's_print' );

And it returns:

http://abc.com/?foo=1&bar=2

This function inserts a link to page’s body via shortcode [my_shortcode], but & is always changed to &#038, and this breaks the link (it’s not working anymore).
I googled a lot. There are some solutions:

wp_specialchars_decode($foo);
remove_filter('the_content','wptexturize');

But those seems to be only for use in theme (functions.php) and it doesn’t work for a shortcode (I tried adding it before or inside the shortcode function).

I don’t want to fall to last solution, which is commenting some lines in WordPress formatting.php file because I’m working on a plugin which will be used by many people.

Answer 1

I had a similar problem that I addressed with the clean_url filter. See the edit on my answer here.

It wasn’t in a shortcode, so I can’t guarantee it’ll work in your particular situation. Might be worth a shot though.

EDIT by oyatek
(modified solution from the link aboove):

function so_handle_038($content) {
    $content = str_replace(array("&","&"), "&", $content); 
    return $content;
}
add_filter('the_content', 'so_handle_038', 199, 1);