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I trying get the categories in a function from a selected blog on my multisite with switch_to_blog, but I get the categories of the current blog, and I dont understand, why... I searched the solution on the net, but I dont find anything about this problem... Here is my code:

function getcatsfromblog(){
require_once( $_SERVER['DOCUMENT_ROOT'] . '/wp-load.php' );
$blog_id = get_blog_id_from_url( 'site2.network.com' ); 
// GET CATS
switch_to_blog( $blog_id );
$categories = get_categories( array(
    'orderby' => 'name',
    'order'   => 'ASC'
) );

foreach( $categories as $category ) {
echo '<input type="radio" value="' . $category->name . '">' . $category->name . '</input>';
}
restore_current_blog();
}
getcatsfromblog();

Any idea, whats wrong with this? (I call this function with AJAX, but except of the swith_to_blog, everything working...)

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The problem originate from the global value $blog_id. In similar case need to use anything else instead of $blog_id, like $my_blog_id. https://wordpress.stackexchange.com/a/166734/134567

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