Detailed explanation of the black technology of how to convert PHP objects into arrays

Usually in php, it takes some effort to process objects into arrays.
But here today, I will tell you a so easy black technique to solve this problem.

<?php
/**
 * Created by PhpStorm.
 * User: zrj
 * Date: 17-10-20
 * Time: 下午8:08
 */
declare(strict_types=1);//开启强类型模式

class Person
{
    public $name;
    public $age;

    public function __construct(string $name,int $age)
    {
        $this->name = $name;
        $this->age = $age;
    }
}

$jack = new Person(&#39;Jack&#39;, 18);
echo print_r($jack, true);
echo "<p>";

//对象转数组
$jack = json_decode(json_encode($jack), true);
echo print_r($jack, true);

Let’s take a look at the results:

Person Object
(
    [name] => Jack
    [age] => 18
)

Array
(
    [name] => Jack
    [age] => 18
)

Idea analysis:

1. First process the object as json_encode json string.
   
   

2. # Perform json_decode processing on the converted json string.

   json_decode(json_encode($obj),true);

##Summary:

Advantages: Simple and fast.

Disadvantages: Will consume double times the memory.

Correct Get posture:

The object itself occupies a small amount of memory and can be used directly.

When the object itself occupies a large amount of memory (such as thousands of records forming a data set object), occupying twice the memory may cause the PHP Due to the memory limit, an exception occurred.

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