What is stdClass in PHP? how to use? (code example)

What is stdClass in PHP? This article will introduce you to stdClass in PHP and introduce its purpose and usage. I hope it will be helpful to you.

What is stdClass? What is the use?

stdClass is the class prototype and empty class in PHP. It is the simplest object and is used to convert other types into objects; it is similar to Java or Python objects.

stdClass is not the base class of the object. If you convert an object to an object, it will not be modified. However, if it is not NULL, if the object's type is converted, an instance of stdClass is created; if it is NULL, the new instance will be empty.

Purpose:

1. stdClass directly accesses members by calling them.

2. It is very useful in dynamic objects.

3. It is used to set dynamic properties, etc.

Usage examples of stdClass

Below we will briefly introduce the use of stdClass through examples.

Example 1: Comparison of using arrays and stdClass to store data

Using arrays to store data

<?php 
header("content-type:text/html;charset=utf-8");   
// 定义一个学生数组
$student_detail_array = array( 
  "student_id" => "18201401", 
    "name" => "李华", 
    "age" => "20", 
    "college" => "计算机科学"
); 
  
// 显示数组内容
var_dump($student_detail_array); 
?>

Output:

Use stdClass instead of array to store student information (dynamic properties)

<?php 
header("content-type:text/html;charset=utf-8");   
// 定义一个学生对象
$student_object = new stdClass; 
$student_object->student_id = "18201401"; 
$student_object->name = "李华"; 
$student_object->age = 20; 
$student_object->college = "计算机科学"; 
      
// 显示学生对象的内容
var_dump($student_object); 
?>

Output:

Note: You can convert array types to objects and objects to arrays.

Example 2: Convert Array to Object

<?php 
header("content-type:text/html;charset=utf-8");   
// 定义一个学生数组
$student_detail_array = array( 
  "student_id" => "18201401", 
    "name" => "李华", 
    "age" => "20", 
    "college" => "计算机科学"
); 
$employee = (object) $student_detail_array; 
// 显示数组内容   
var_dump($employee); 
?>

Output:

Example 3: Convert object properties to array

<?php 
header("content-type:text/html;charset=utf-8");   
// 定义一个学生对象
$student_object = new stdClass; 
$student_object->student_id = "18201401"; 
$student_object->name = "李华"; 
$student_object->age = 20; 
$student_object->college = "计算机科学"; 
//转换
$student_array = (array) $student_object; 
// 显示学生对象的内容
var_dump($student_array); 
?>

Output:

The above is the entire content of this article, I hope it can It will be helpful to everyone’s study. For more exciting content, you can pay attention to the relevant tutorial columns of the PHP Chinese website! ! !

The above is the detailed content of What is stdClass in PHP? how to use? (code example). For more information, please follow other related articles on the PHP Chinese website!