Language display in a drop-down menu, and in the header.

OK … it’s not that hard. 😉

Insert some code – for example like this –

<select id="msls_languages">
<?php if (function_exists ('the_msls')) the_msls (); ?>
<select>

in your header where you would like to have the drop-down. In your functions.php insert a function like this

function my_msls_output_get( $url, $link, $current ) {
    return sprintf(
        '<option value="%s"%s>%s</option>',
        $url,
        ( $current ? ' selected="selected"' : '' ),
        $link
    );
}
add_filter( 'msls_output_get', 'my_msls_output_get', 10, 3 );

Hope this helps.

Cheers,
Dennis.

An image in an option? I’m quite sure that this will not work in all browsers.

I think you could accomplish this much easier if you would set the output-options of the plugin (please read https://github.com/lloc/Multisite-Language-Switcher/wiki/Settings) and then try to format the generated <ul> and the <li>s by this line of code

<?php if (function_exists ('the_msls')) the_msls (); ?>

with CSS.

Thanks for the link (BTW: There are images in the generated code of the drop-down. Please have a look at the html-code!).

Yes, a drop-down like this does nothing. You could make use of a little bit of JavaScript. Maybe something like that:

http://stackoverflow.com/questions/5150363/onchange-open-url-via-select-jquery