Snippets & Examples

Often I get some small requests on how to do specific integrations. There are already some API Functions that come with the plugin. Sometimes the is additional work for custom plugins. The following content is a collection of solutions that I suggested to other user.

Get the current language

In most cases you should use the function get_locale provided by WordPress if you want to know the language of the current blog. The Multisite Language Switcher has also a similar functionality that sets the language to en_US in case it is empty.

$blog     = msls_blog_collection()->get_current_blog();
$language = $blog->get_language(); // en_US
$alpha2   = $blog->get_alpha2(); // en

Manipulate the Nav Menu

The class MslsOutput comes in handy when you’d like to manipulate the items of a Navigation Menu.

Using the classes of the plugin is not as save as starting from the API Functions provided by the Multisite Language Switcher.

First you should check if plugin is active (just check for the existence of function the_msls) and if it is the primary menu in your theme (the name can vary). Then you can create the object and request the array of links (in my example just linked flags) to the translations. After that you can create the output, add it to $items and return it.

Here comes a simplified version of the add-on MslsMenu:

function my_custom_menu_item( $items, $args ) {
    if ( function_exists ( 'the_msls' ) && 'primary' == $args->theme_location ) {
        $obj = lloc\Msls\MslsOutput::init();
        $arr = $obj->get( 2 );
        if ( !empty( $arr ) ) {
            $items .= '<li>' . implode( '</li><li>', $arr ) . '</li>';
    return $items;
add_filter( 'wp_nav_menu_items', 'my_custom_menu_item', 10, 2 );

You could pass – of course – other values different from 2. Here is a list with all possibilities:

/* MslsLink - Image + text */
$arr = $obj->get( 0 );

/* MslsLinkTextOnly - Just text	*/
$arr = $obj->get( 1 );

/* MslsLinkImageOnly - Just image */
$arr = $obj->get( 2 );

/* MslsLinkTextImage - Text + image */
$arr = $obj->get( 3 );

The blog collection

If you want to use the collection of blogs – which is created by the plugin – in your functions (and filters), you could write code like this:

function my_print_something() {
    foreach ( msls_blog_collection()->get() as $blog ) {
            '<link rel="alternate" hreflang="%1$s" href="http://%1$" />',
add_action( 'wp_head', 'my_print_something' );`

The above example prints the link references to your blogs in all HTML headers of the output. This is just a simplified version of what the plugin already does.

Hook reference »

This post is also available in Deutsch.