PHP add two numbers in class

Question

I'm trying to build a function inside a PHP class, however whenever I invoke the function, I am only returning the first variable.

        class Nums  
{
    private $a = 7;
    private $b = 8;

    public function sum() 
    {
        return $this->a + $this->b;
    }

    public function __set($name,$value) {
      switch($name) { 
        case 'a': 
          return $this->setA($value);
        case 'b': 
          return $this->setB($value);
      }
    }

    public function __get($name) {
      switch($name) {
        case 'a': 
          return $this->getA();
        case 'b': 
          return $this->getB();
      }
    }

    private function setA($i) {
      $this->a = $i;
    }

    private function getA() {
      return $this->$a;
    }

    private function setB($i) {
      $this->b = $i;
    }

    private function getB() {
      return $this->$b;
    }

}

Am I doing something wrong here, because I can't really see what is wrong with this logic.

I added the set and get components which I used to modify the class, I didn't think this was the issue. Obviously it was. When I called the sum fuction I was trying to get the private variable, when I should be using the name I defined in the swtich statement. — League
– League, Commented Nov 1, 2015 at 10:26

Yuva Raj · Accepted Answer · 2015-11-01 10:06:43Z

1

It's working for me. Here's what i tried and it output 15.

PHP CODE :

<?php

class Nums  
{
    private $a = 7;
    private $b = 8;

    public function sum() 
    {
        return $this->a + $this->b;
    }

}

$obj = new Nums();
$c = $obj->sum();
echo $c;

?>

OUTPUT :

answered Nov 1, 2015 at 10:06

Yuva Raj

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David Demetradze · Accepted Answer · 2015-11-01 10:01:42Z

0

  class Nums  
  {
    private $a = 7;
    private $b = 8;

    public function sum() 
    {
        return $this->a + $this->b;
    }
  }

$numObj = new Nums();
echo $numObj->sum();

Running this code returns 15 for me

answered Nov 1, 2015 at 10:01

David Demetradze

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