加载类:
include("./Ren.class.php");
include "./Ren.class.php"; 用此方法的时候include后面要加空格
require("./Ren.class.php");
require "./Ren.class.php";
require_once("./Ren.class.php");
require_once "./Ren.class.php";
自动加载类的方法 (所有的类文件要放在同一目录下,所有类文件的命名规则一致)
function __autoload($classname)
{
require $classname.".class.php";
}
$r = new Ren();
设计模式
单例模式:类的计划生育
1.让该类在外界无法造对象
2.让外界可以造一个对象,做一个静态方法返回对象
3.在类里面通过静态变量控制返回对象只能是一个
class Dog
{
static $dx;
public $test;
private function __construct()
{
}
static function DuiXiang()
{
//return new Dog();
if(empty(self::$dx)) 静态要加self
{
self::$dx=new Dog();
}
return self::$dx;
}
}
$a=Dog::DuiXiang();
$b=Dog::DuiXiang();
$b->test="hello";
var_dump($a);
工厂模式:
class YunSuan
{
public $a;
public $b;
function Jia()
{
return $a+$b;
}
function Jian()
{
return $a-$b;
}
}
abstract class YuanSuan
{
public $a;
public $b;
function Suan()
{
}
}
class Jia extends YuanSuan
{
function Suan()
{
return $this->a+$this->b;
}
}
class Jian extends YuanSuan
{
function Suan()
{
return $this->a-$this->b;
}
}
class Cheng extends YuanSuan
{
function Suan()
{
return $this->a*$this->b;
}
}
$j = new Cheng();
$j->Suan();
class GongChang
{
static function ShengChan($f)
{
switch($f)
{
case "+":
return new Jia();
break;
case "-":
return new Jian();
break;
case "*":
return new Cheng();
break;
}
}
}
$r = GongChang::ShengChan("*");
$r->a=10;
$r->b=5;
echo $r->Suan();