<?php
header('Content-Type:text/html;charset=utf-8');
/*
static的应用
静态属性和静态方法：属性或方法前面加一个static
*/
class Human
{
public static $header = 1;
public function changehead()
{
self::$header = 9;
}
public function getheader()
{
return self::$header;
}
}
echo Human::$header;
//用来读取类中（不是对象）的属性和方法
$m1 = new Human();
$m1->changehead();
$m2 = new Human();
$m3 = new Human();
echo $m2->getheader();
echo $m3->getheader();
