PHP-面向对象(封装与面向对象方法)

function __construct(){
}
注意：前面是两个下划线

<?php
class Student {
	public function __construct() {
		echo '这是构造方法<br>';
	}
}
new Student();	//这是构造方法
new Student();	//这是构造方法

class Student {
	//和类名同名的方法是构造方法，PHP中不建议使用
	public function Student() {
		echo '这是构造方法<br>';
	}
}
/*
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Student has a deprecated constructor in F:\wamp\www\6-demo.php on line 2
这是构造方法
*/

<?php
class Student {
	private $name;
	private $sex;
	//构造函数初始化成员变量
	public function __construct($name,$sex) {
		$this->name=$name;
		$this->sex=$sex;
	}
	//显示信息
	public function show() {
		echo "姓名：{$this->name}<br>";
		echo "性别：{$this->sex}<br>";
	}
}
//实例化
$stu=new Student('tom','男');
$stu->show();
//运行结果
/*
姓名：tom
性别：男
*/