How to convert object to associative array in PHP

Objects are instances of classes. It's just a sample of a class with a memory allocated. Array is a data structure that stores one or more values ​​of similar type under one name, but associative arrays are different from simple PHP arrays. An array containing string indices is called an associative array. It associates element values ​​with key values ​​rather than storing them in linear index order.

Method 1:

Using json_decode and json_encode methods: json_decode function accepts JSON encoded string and converts it to PHP variable, json_encode on the other hand returns the JSON encoded string of the given value.

Syntax:

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

Example:

<?php 
class sample { 
      
    /* 成员变量 */
    var $var1; 
    var $var2; 
      
    function __construct( $par1, $par2 )  
    { 
        $this->var1 = $par1; 
        $this->var2 = $par2; 
    } 
} 
  
//创建的对象 
$myObj = new sample(1000, "second"); 
echo "转换前: \n"; 
var_dump($myObj); 
  
// 将对象转换为关联数组
$myArray = json_decode(json_encode($myObj), true); 
echo "转换后: \n"; 
var_dump($myArray); 
?>

Output:

转换前: 
object(sample)#1 (2) {
  ["var1"]=>
  int(1000)
  ["var2"]=>
  string(6) "second"
}
转换后: 
array(2) {
  ["var1"]=>
  int(1000)
  ["var2"]=>
  string(6) "second"
}

Method 2:

Type conversion object to array: Type conversion is a method of converting a data type variable to a different data type. It is only an explicit conversion of the data type. It can convert PHP objects to arrays using the type conversion rules supported in PHP.

Syntax:

$myArray = (array) $myObj;

Example:

<?php 
class bag { 
      
    /* 成员变量 */
    var $item1; 
    var $item2; 
    var $item3; 
      
    function __construct( $par1, $par2, $par3)  
    { 
        $this->item1 = $par1; 
        $this->item2 = $par2; 
        $this->item3 = $par3; 
    } 
} 
  
// 创建myBag对象 
$myBag = new bag("Mobile", "Charger", "Cable"); 
echo "转换前: \n"; 
var_dump($myBag); 
  
// 将对象转换为数组
$myBagArray = (array)$myBag; 
echo "转换后: \n"; 
var_dump($myBagArray); 
?>

Output:

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

This article is about the method of converting objects into associative arrays in PHP The introduction is also very simple. I hope it will be helpful to friends in need!

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