Direct checkout WPLMS pluign

functions.php

add_action('template_redirect',function(){
  if( is_single() && get_post_type() == 'product' && isset($_GET['redirect'])){ 
    global $woocommerce; 
    $found = false;
    $product_id = get_the_ID();
    $courses = vibe_sanitize(get_post_meta(get_the_ID(),'vibe_courses',false));

    if(isset($courses) && is_array($courses) && count($courses)){
      if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
          foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
          $_product = $values['data'];
            if ( $_product->id == $product_id )
                $found = true;
          }
          // if product not found, add it
          if ( ! $found )
            WC()->cart->add_to_cart( $product_id );
          $cart_url = esc_url( wc_get_cart_url() ); 
          wp_redirect( $cart_url); 
      }else{
          WC()->cart->add_to_cart( $product_id );
          $cart_url = esc_url( wc_get_cart_url() ); 
          wp_redirect( $cart_url);
      }
      exit();
    }
}
});

add_filter('vibe_get_option',function($return,$field){
		if($field == 'direct_checkout'){
			$return = 1;
		}	
    return $return;
},10,2);