PHP object-oriented basic concept example tutorial

This article mainly introduces the basic concepts of the PHP introductory tutorialObject-oriented, and briefly analyzes the definition of classes, object creation, and Constructor, member variables, Member method, etc. Friends in need can refer to The examples in this article describe the basic concepts of PHP object-oriented. Share it with everyone for your reference, the details are as follows:

Demo1.php

';
  var_dump($computer1);
?>

Demo2.php

 表示指向
// $computer1 = new Computer();
// echo $computer1 -> _name;
// $computer1 -> _name = 'dell';
// echo $computer1 -> _name;
  class Computer {
    //字段成员的声明格式：修饰符 变量名 [=xxx];
    public $_name; //public 表示共有，类外可以访问
    public $_model;
  }
  //创建一个对象，生产出一台电脑 -> 表示指向
  $computer1 = new Computer();
  //给成员字段赋值
  $computer1 -> _name = '联想';
  //取值
  echo $computer1 -> _name;
?>

Demo3.php

 表示指向
  $computer1 = new Computer();
  $computer1 -> _run();
?>

Demo4.php

 表示指向
// $computer1 = new Computer();
// echo $computer1 -> _name;
// $computer1 -> _name = 'dell';
// echo $computer1 -> _name;
  class Computer {
    //字段成员的声明格式：修饰符 变量名 [=xxx];
    public $_name; //public 表示共有，类外可以访问
    public $_model;
  }
  //创建一个对象，生产出一台电脑 -> 表示指向
  $computer1 = new Computer();
  //给成员字段赋值
  $computer1 -> _name = '联想';
  //取值
  //echo $computer1 -> _name;
  $computer2 = $computer1;
  echo $computer2 -> _name;
?>

Demo5.php

 表示指向
  $computer1 = new Computer();
  $computer1 -> _run('一站式建网站');
?>

Demo6.php

Demo7.php

Demo8.php

 _run();
?>

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