Convert an object to associative array in PHP

<?php
class sample {
    
    /* Member variables */
    var $var1;
    var $var2;
    
    function __construct( $par1, $par2 ) 
    {
        $this->var1 = $par1;
        $this->var2 = $par2;
    }
}

// Creating the object
$myObj = new sample(1000, "second");
echo "Before conversion: \n";
var_dump($myObj);

// Converting object to associative array
$myArray = json_decode(json_encode($myObj), true);
echo "After conversion: \n";
var_dump($myArray);
?>

<?php
class bag {
    
    /* Member variables */
    var $item1;
    var $item2;
    var $item3;
    
    function __construct( $par1, $par2, $par3) 
    {
        $this->item1 = $par1;
        $this->item2 = $par2;
        $this->item3 = $par3;
    }
}

// Create myBag object
$myBag = new bag("Mobile", "Charger", "Cable");
echo "Before conversion : \n";
var_dump($myBag);

// Converting object to an array
$myBagArray = (array)$myBag;
echo "After conversion : \n";
var_dump($myBagArray);
?>

<?php
class car
{
    /* Member variables */
    var $make;
    var $model;
    var $year;

    function __construct($make, $model, $year)
    {
        $this->make = $make;
        $this->model = $model;
        $this->year = $year;
    }
}

// Create car object
$myCar = new car("Toyota", "Corolla", 2020);
echo "Before conversion: \n";
var_dump($myCar);

// Converting object to an associative array
$myCarArray = get_object_vars($myCar);
echo "After conversion: \n";
var_dump($myCarArray);

?>