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Convert an object to associative array in PHP

Object is an instance of a class. It is simply a specimen of a class and has a memory allocated. Array is the data structure that stores one or more similar type of values in a single name but associative array is different from simple PHP array. An array which contains string index is called associative array. It stores element values in association with key values rather than in a linear index order.

Metod 1: Using json_decode and json_encode method: The json_decode function accepts JSON encoded string and converts it into a PHP variable on the other hand json_encode returns a JSON encoded string for a given value.

Syntax:

$myArray = json_decode(json_encode($object), true);

Example:

<?php
class sample {
      
    /* Member variables */
    var $var1;
    var $var2;
      
    function __construct( $par1, $par2
    {
        $this->var1 = $par1;
        $this->var2 = $par2;
    }
}
  
// Creating the object
$myObj = new sample(1000, "second");
echo "Before conversion: ";
var_dump($myObj);
  
// Converting object to associative array
$myArray = json_decode(json_encode($myObj), true);
echo "After conversion: ";
var_dump($myArray);
?>

Output:



Before conversion: 
object(sample)#1 (2) {
  ["var1"]=>
  int(1000)
  ["var2"]=>
  string(6) "second"
}
After conversion: 
array(2) {
  ["var1"]=>
  int(1000)
  ["var2"]=>
  string(6) "second"
}

Method 2: Type Casting object to an array: Typecasting is the way to utilize one data type variable into the different data type and it is simply the explicit conversion of data type. It can convert a PHP object to an array by using typecasting rules supported in PHP.

Syntax:

$myArray = (array) $myObj;

Example:

<?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
$myBag = new bag("Mobile", "Charger", "Cable");
echo "Before conversion : ";
var_dump($myBag);
  
// Coverting object to an array
$myBagArray = (array)$myBag;
echo "After conversion : ";
var_dump($myBagArray);
?>

Output:

Before conversion : 
object(bag)#1 (3) {
  ["item1"]=>
  string(6) "Mobile"
  ["item2"]=>
  string(7) "Charger"
  ["item3"]=>
  string(5) "Cable"
}
After conversion : 
array(3) {
  ["item1"]=>
  string(6) "Mobile"
  ["item2"]=>
  string(7) "Charger"
  ["item3"]=>
  string(5) "Cable"
}


This article is attributed to GeeksforGeeks.org

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