一、类是抽象出来的，对象是具体的；对象是类的实例。
二、练习代码：
1、写了一个用来描述学生的类：student.
实例
<?php
class Student{
//学生类
public $name='';
public $cardid='';
public $cardtype='';
public $schoolid='';
public $xjcard='';
public $birthday='';
public $bornwhere='';
public $buji='';
public $nation='';
public $guoji='';
public $health='';
public $hukoutype='';
public $hujiwhere='';
public $bjcode='';
public $bj='';
public $indate='';
public $intype='';
public $studytype='';
public $address='';
public $tel='';
public $is_onlychild=1;
public $is_stayhome=1;
public $is_help=0;
public $is_helped=0;
public $is_ykd=1;
public $alone=0;
public $schoolcode='';
public $member1_cardid='';
public $memner2_cardid='';
//构造器
public function __construct(array $stuinfo)
{
$this->name=array_key_exists('name',$stuinfo)?$stuinfo['name']:'';
$this->cardid=array_key_exists('cardid',$stuinfo)?$stuinfo['cardid']:'';
$this->cardtype=array_key_exists('cardtype',$stuinfo)?$stuinfo['cardtype']:'';
$this->schoolid=array_key_exists('schoolid',$stuinfo)?$stuinfo['schoolid']:'';
$this->xjcard=array_key_exists('xjcard',$stuinfo)?$stuinfo['xjcard']:'';
$this->birthday=array_key_exists('birthday',$stuinfo)?$stuinfo['birthday']:'';
$this->bornwhere=array_key_exists('bornwhere',$stuinfo)?$stuinfo['bornwhere']:'';
$this->huji=array_key_exists('huji',$stuinfo)?$stuinfo['huji']:'';
$this->nation=array_key_exists('nation',$stuinfo)?$stuinfo['nation']:'汉族';
$this->guoji=array_key_exists('guoji',$stuinfo)?$stuinfo['guoji']:'中国';
$this->health=array_key_exists('health',$stuinfo)?$stuinfo['health']:'';
$this->hujiwhere=array_key_exists('hujiwhere',$stuinfo)?$stuinfo['hujiwhere']:'';
$this->hukoutype=array_key_exists('hukoutype',$stuinfo)?$stuinfo['hukoutype']:'非农业户口';
$this->bj=array_key_exists('bj',$stuinfo)?$stuinfo['bj']:'';
$this->bjcode=array_key_exists('bjcode',$stuinfo)?$stuinfo['bjcode']:'';
$this->indate=array_key_exists('indate',$stuinfo)?$stuinfo['indate']:'';
$this->intype=array_key_exists('intype',$stuinfo)?$stuinfo['intype']:'';
$this->studytype=array_key_exists('studytype',$stuinfo)?$stuinfo['studytype']:'走读';
$this->address=array_key_exists('address',$stuinfo)?$stuinfo['address']:'';
$this->tel=array_key_exists('tel',$stuinfo)?$stuinfo['tel']:'';
$this->is_onlychild=array_key_exists('is_onlychild',$stuinfo)?$stuinfo['is_onlychild']:1;
$this->is_stayhome=array_key_exists('is_stayhome',$stuinfo)?$stuinfo['is_stayhome']:0;
$this->is_ykd=array_key_exists('is_ykd',$stuinfo)?$stuinfo['is_ykd']:1;
$this->is_help=array_key_exists('is_help',$stuinfo)?$stuinfo['is_help']:0;
$this->is_helped=array_key_exists('is_helped',$stuinfo)?$stuinfo['is_helped']:0;
$this->is_alone=array_key_exists('is_alone',$stuinfo)?$stuinfo['is_alone']:0;
$this->schoolcode=array_key_exists('schoolcode',$stuinfo)?$stuinfo['schoolcode']:'';
$this->member1_cardid=array_key_exists('member1_cardid',$stuinfo)?$stuinfo['member1_cardid']:'';
$this->member2_cardid=array_key_exists('member2_cardid',$stuinfo)?$stuinfo['member2_cardid']:'';
}
//获取器
public function __get($name)
{
$msg = null;
if (isset($this->$name)) {
$msg = $this->$name;
} elseif (isset($this->data[$name])) {
$msg = $this->data[$name];
} else {
$msg = '无此属性';
}
return $msg;
}
//设置器
public function __set($name, $value)
{
$this->$name = $value;
}
}
?>
运行实例 »
点击 "运行实例" 按钮查看在线实例2.测试类的操作：初始化，更改和获取公共属性。
实例
<?php require 'Student.php'; $stuinfo=['name'=>'张三','cardid'=>'420528200709080023','bj'=>'1801','hujiwhere'=>'湖北宜昌伍家岗','member1_cardid'=>'427232197208090021']; $stu=new Student($stuinfo);//初始化 echo $stu->name,"</br>",$stu->cardid,"</br>",$stu->bj,"</br>",$stu->hujiwhere,"</br>",$stu->member1_cardid,"<br>"; //更改属性值 $stu->name='李四'; echo $stu->name,"<hr>"; ?>
运行实例 »
点击 "运行实例" 按钮查看在线实例
三、总结：这部分知识早己掌握，只是在项目实施时，还是未能完全按照面向对象的思想来实施。需要进一步学习。
