What is the factory pattern and factory method pattern in PHP?

The core of the factory method pattern is that the factory class is no longer responsible for the creation of all objects, but leaves the specific creation work to subclasses, becoming an abstract factory role, which is only responsible for giving specific factory classes that must be implemented Interface, without touching the details of which product class should be instantiated, we can delve into:

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Factory:

$a = new Dog('abc');

Define some methods in the interface

The class that implements the interface implements these methods

Factory class:Used to instantiate objects

Advantages:Provides a flexible dynamic expansion mechanism for the system structure. Convenient maintenance

We use code to demonstrate what the factory mode is. First, create a new file. We create an interface in the file. There are two methods in the interface. Then we write two classes to implement this interface, and then we We need to write out the two methods we just defined, and then we are writing a class. So, how do we write them in a factory and create the two objects we defined through the factory? We first create a factory class, and then in the class Write a static method inside, and then pass us a type, and then we choose the type. If our type is person, then we create a person. If we want to create a human object, we only need to create it through a factory. , the specific code is as follows:

<?php
interface Skill
{
function family();
function pome();
}
class Person implements Skill
{
  function family()
{
  echo &#39;如果努力有用的话，还要天才干什么<br />&#39;;
}
   function pome()
{
echo &#39;爱恨痴狂，抵不过沧海一笑&#39;;
}
}
class JingLing implements Skill
{
  function family( )
{
  echo &#39;为什么会痛苦，一直微笑就好了<br />&#39; ;
}
  function buy()
{
  echo &#39;嘴上说不要，但你的眼睛很诚实嘛<br />&#39;;
}
}
class Factory 
{
  static function createHero($type)
  {
    switch ($type) {
      case&#39;person&#39; :
        return new Person();
      break;
      case&#39;jingling&#39; :
        return new JingLing();
      break;
}
}
}
$person = Factory::createHero(&#39;person&#39;);
$jing = Factory::createHero(&#39;jingling&#39;);

The above is what we call the factory pattern;

Factory method:

The core of the factory method pattern is the factory The class is no longer responsible for the creation of all objects, but leaves the specific creation work to subclasses, becoming an abstract factory role. It is only responsible for giving the interface that the specific factory class must implement, without touching which product. The details of the class should be instantiated

According to the above code, we understand that our factory pattern is responsible for creating objects. Let's take the code as an example: specify an interface, the same two methods, and then we write two class, and the factory class we established is only responsible for stipulating the interface, and the specific implementation is left to the subclass. Let’s take the code as an example:

<?php
interface Tell
{
function pome();
function receive();
}
class shiju implements TeLL
{
function pome( )
{
echo &#39;没有心，就不会受伤&#39;;
}
function receive( )
{
echo&#39;守护爱人的心，因恐惧失去而无悔&#39;;
}
}
class HuaWei implements TeLL
{
function call()
{
echo &#39;不知道你的名字，但知道你的死期&#39;;
}
function receive( )
{
echo &#39;花有再开的那天，人有重逢的时候吗？&#39;;
}
}
//工厂类只负责规定接口，具体的实现交给子类
interface Factory
{
  static function createPhone( );
}
class XiaoFactory implements Factory
{
  static function createPhone( )
  return new XiaoMi ();
}
}
class HuaWeiFactory implements Factory
{
static function createPhone()
{
  return new HUawei();
}
}

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