passing function values to another function in same class

问题:

I want to pass function values to another function in the same class, like to store some values in a variable and then call this variable in another function in the same class.

Here is my Code

public function ven_coupon()     {         if ($_POST) {             $number = $_POST['coupon'];             $query = $this->front->ven_coupon($number);             if (count($query) <= 0 ) {                 echo "Not Valid";             }             $payment = $this->cart->total();             $dis = $query['discount'];             $name = $query['username'];             $number = $query['number'];             $discount['discount'] = ($payment*$dis)/100;             $discount['data'] = $dis;             $this->load->view('checkout',$discount);         }     }      public function addcart()     {         $ven = $this->ven_coupon();         echo $ven($name);         echo $ven($dis);         echo $ven($number);     } 

回答1:

You could create the fields(variables) you need outside the function then use them using the this keyword. For example:

private $dis; private $name; private $number;  public function ven_coupon() {     if ($_POST) {         $number = $_POST['coupon'];         $query = $this->front->ven_coupon($number);         if (count($query) <= 0 ) {             echo "Not Valid";         }         $payment = $this->cart->total();         $this->dis = $query['discount'];         $this->name = $query['username'];         $this->number = $query['number'];         $discount['discount'] = ($payment*$dis)/100;         $discount['data'] = $dis;         $this->load->view('checkout',$discount);     } }   public function addcart() {     $ven = $this->ven_coupon();     echo $this->name;     echo $this->dis;     echo $this->number; } 

回答2:

Scope of variable is inside the function. You need to made variable as a part of class as:

Basic Example:

class yourClass{    private $name;     public function functionA(){       $this->name = "devpro"; // set property    }     public function functionB(){       self::functionA();       echo $this->name; // call property    } } 

回答3:

your function ven_coupon() doesn't return anything, therefore $ven is empty when you read it in your function addcart().

in order to pass several variables from one function to another, you need to create an array.

function ven_coupon(){    $dis = $query['discount'];    $name = $query['username'];    $data=array('dis'=>$dis,'name'=>$name)    return $data } function addcart() {     $ven = $this->ven_coupon();     echo $ven['name'];     //etc. } 

Edit: as you are already using an array $query you could simply return $query; in function ven_coupon and then read it in your function addcart()

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