PHP学习（9）面向对象开发学习（二）

<?php



class zhutou{



public $zhu;
public $tou;


function ben(){
  return "wohenben";
}
function qiang(){
  return "wohenqiang";
}
function keai(){
  return "wohenkeai";
}
}


$zt1=new zhutou();
$zt2=new zhutou();


$zt1->qiang="wohenqiang";

$zt2->qiang="feichangqiang";



echo $zt1->qiang.$zt1->ben()."<br>";
echo $zt2->qiang.$zt2->keai()."<br>";


?>






<?php



class zt{



public $zhu;
public $tou;


function ben(){
  return $this->zhu."wohenben";
}
function qiang(){
  return $this->tou."wohenqiang";
}
function keai(){
  return "wohenkeai";
}
}


$zt1=new zt();
$zt2=new zt();


$zt1->qiang="wohenqiang";

$zt2->qiang="feichangqiang";



echo $zt1->qiang.$zt1->ben()."<br>";
echo $zt2->qiang.$zt2->keai()."<br>";


?>







<?php



class zt3{



public $zhu;
public $tou;


function zt3($zhu="",$tou=""){
  $this->zhu=$zhu;
  $this->tou=$tou;
}//PHP4的初始化
//PHP5的初始化是"__construct"函数
function ben(){
  return $this->zhu.$this->tou."wohenben";
}
function qiang(){
  return $this->zhu.$this->tou."wohenqiang";
}
function keai(){
  return $this->keai."wohenkeai";
}
function __destruct(){
  echo "<br>========".$this->zhu."<br>";
}//析构封装
}


$zt1=new zt3('liujuanxiao1','woai');
$zt2=new zt3('liujuanxiao2','xihuan');



echo $zt1->ben()."<br>";
//$zt1=null;//一步步回收
echo $zt2->qiang()."<br>";
?>