What are the ways to create objects in php

php methods to create objects are: 1. Use [new class name ()] to create; 2. Put the class name in a variable as a string; 3. Use objects to create objects; 4 , Use [new self()] to create; 5. Use [new parent()] to create; 6. Use [new static] to create.

The methods are as follows:

1. Create an object with new class name ()

2. The class name is placed in a variable as a string

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3. Use an object to create an object, and the object is A new object

4. Use new self(); If there is an inherited class new self() returns an instance of that class in which class

5. Use new parent();

6. Use new static() to return an object of the caller’s class

Code example:

<?php
class Demo
{
	public $name = "peter";
	public function getName(){
		return $this->$name;
	}
	public function getObj(){
		return new self();
	}
	public function getStaticObj(){
		return new static();
	}
}
 
class Demo1 extends Demo
{
	public function getParent(){
		return new parent();
	}
}
echo &#39;<pre/>&#39;;
//1.用new 类名（）创建一个对象
$obj = new Demo();
//2.将类名以字符串的方式放在一个变量中
$className = &#39;demo&#39;;
$obj1 = new $className();
//3.用对象来创建对象，并且该对象是一个新对象
$obj2 = new $obj();  // $obj2 = $obj 不同的
//4.用new self(); 如果有继承类 new self() 在哪个类中返回的就是哪个类的实例
$obj3 = $obj->getObj();
//5.用new parent();
$obj4 = (new Demo1)->getParent();
//6.用new static() 返回的是调用者的类的对象
$obj5 = $obj->getStaticObj();

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