Thinkphp Learning (iv) multiple nested loops for advanced application of Volist label

Action Code:

    The Public Function index () {
		$prod = I ("get.prod_en");
		$id = I ("Get.id", 0, "int");
		if ($prod = = "") {
			$serviceProduct = array ();//Multiple Loops traversal array

The data is stored in two tables, where the $serviceproduct array is initialized by looping
			$service = M ("Product_class")->order ("oid ASC")->select ();
			for ($i = 0; $i < count ($service); $i + +)
			{
				Array_push ($serviceProduct, Array ("Srvname" => $service [$i] ["PC _CN "]," Product "=>m (" Product ")->where (" prod_class_id= ". $service [$i] [" Pcid "])->order (" oid ASC ")-> Select ());
			}

If you want to output variables in a template, you must pass the variable to the template in the controller, and the system provides a assign method to assign values to the template variable
, regardless of the type of variable that uses the Assign assignment uniformly.
			$this->assign ("Serviceproduct", $serviceProduct);
			$this->display ();
		} else{
			if ($id > 0) {
				$this->display ("detail");
			} else{
				$this->assign (' prod_en ', $prod);
				$clsList = M ("Question_class")->order ("oid ASC")->select ();
				$this->assign (' clslist ', $clsList);
				
				$qusList = M ("question")->order ("oid ASC")->select ();
				$this->assign (' quslist ', $qusList);
				$this->display ("list");}}
	

Template code:

	
 
  
		
  
   
  
 
    
   

     {$sp. Srvname} 
   
 
     
     
   

     {$pd. PROD_CN} 
   
 
      
      
   
 
      
     
     
     
   
 
   
 
     
   
  
	
 
  

When using multiple nested loops, you need to specify a key value for each volist, by

Determines whether the last element in the array is the same.