PHP advanced object construction and use of factory pattern_PHP tutorial

How to use the PHP design pattern factory pattern

Copy the code The code is as follows:

/*
* Practice the use of PHP design pattern factory pattern every day
* The PHP factory pattern is not difficult to understand. As the name suggests, it is a processing factory, and the factory manufactures products. As long as the product is manufactured
* There must be several elements: "method", "model", "factory floor".
*/
/*First example ordinary factory pattern
* */
abstract class model {//Product model
abstract function getNames();
}
class zhangsan extends model {//Product instance
function getNames(){
return "my name is zhengsan";
}
}
class lisi extends model{//Product instance
function getNames(){
return "my name is lisi";
}
}
abstract class gongchangModel {//Factory model
abstract function getZhangsan();
abstract function getLisi();
}
class gongchang extends gongchangModel{//Factory instance
function getZhangsan(){
return new zhangsan();
}
function getLisi(){
return new lisi();
}
}
$gongchang=new gongchang();//Instancing factory
$zhangsan=$gongchang->getZhangsan();//Manufacturing Product
echo $zhangsan->getNames();//Product output function
?>

I wrote an article about the factory design pattern before. In fact, the factory pattern It includes ordinary factory mode and abstract factory mode, but no matter what factory mode they are, they all have one function, and that is to generate objects.
Okay, let’s use the simplest example below to demonstrate the factory pattern in the PHP design pattern.
I have summarized the three elements of the factory model:
1. Product model
2. Product examples
3. Factory workshop

Copy Code The code is as follows:

abstract class prModel {//Product model
abstract function link();
}
class webLink extends prModel{//Example a product
public function link(){
echo "www.jb51.net";
}
}
class gongchang {//Factory
static public function createLink (){
return new webLink();
}
}
$weblink=gongchang::createLink();//Create an object through the factory
$weblink ->link();//Output www.jb51.net
?>

The above method simply explains how to use the factory class. Focus on object-oriented

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