A brief analysis of php prototype mode, a brief analysis of php prototype_PHP tutorial

A brief analysis of php prototype pattern, a brief analysis of php prototype

Prototype mode:

Use a prototype instance to specify the type of object to be created, and create new objects by copying this prototype.
Application scenario: The class has a lot of resources, performance and security requirements, and is generally used in combination with factory methods.

Copy code The code is as follows:

/**
* Prototype mode
​*/
//Declare an interface that clones itself
interface Prototype {
Function copy();
}
//The product needs to implement the operation of cloning itself
class Student implements Prototype {
//For the sake of simplicity, get set
is not used here Public $school;
Public $major;
       public $name;
Public function __construct($school, $major, $name) {
$this->school = $school;
                   $this->major = $major;
                    $this->name = $name;
}
Public function printInfo() {
                       printf("%s,%s,%sn", $this->school, $this->major, $this->name);
}
Public function copy() {
              return clone $this;
}
}
$stu1 = new Student('Tsinghua University', 'Computer', 'Zhang San');
$stu1->printInfo();
$stu2 = $stu1->copy();
$stu2->name = '李思';
$stu2->printInfo();
?>

As you can see here, if a class has a lot of member variables, if multiple new objects are created externally and assigned one by one, the efficiency will be inefficient and the code will be redundant and error-prone. Just copy itself through the prototype copy and then make minor modifications. Another new object.

This concludes the first part of design patterns, creational patterns. There are two parts below, structural design patterns and behavioral design patterns, which will be continued later.

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