Redirect all 404 to homepage in wordpress

if( !function_exists('redirect_404_to_homepage') ){

    add_action( 'template_redirect', 'redirect_404_to_homepage' );

    function redirect_404_to_homepage(){
       if(is_404()):
            wp_safe_redirect( home_url('/') );
            exit;
        endif;
    }
}

 

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