This great snippet by Philip Borisov make visible (in the backend) images only for own uploader.

This is a great snippet for multi authors website.

You just need to add this snippet in function.php file Continue reading →

function show_image( $wp_query ) {
    if ( strpos( $_SERVER[ 'REQUEST_URI' ], '/wp-admin/upload.php' ) !== false ) {
        if ( !current_user_can( 'level_5' ) ) {
            global $current_user;
            $wp_query->set( 'author', $current_user->id );
        }
    }
}
add_filter('parse_query', 'show_image' );

Thanks to Philip Borisov