php封装的问题
[code=PHP][/code]
定义了一个User类
class User{

private $arr;//进行封装不让外部使用

function __construct(){
$this->arr = $this->get_data();//构造函数，在类一实例化的时候就会执行
}

public function isNotExist(){
echo "Does not exist<br/>";
echo "<a href=\"http://localhost/Reconstruction/Reconstruction002/all.php\">重新输入</a>";
}

private function get_data(){
$arr=array(
array("name"=>"张三","age"=>12,"sex"=>"男"),
array("name"=>"李四","age"=>25,"sex"=>"男"),
array("name"=>"王五","age"=>18,"sex"=>"男"),
array("name"=>"李利","age"=>16,"sex"=>"女"),
array("name"=>"陈明","age"=>25,"sex"=>"男"),
array("name"=>"张晓","age"=>25,"sex"=>"女"),
array("name"=>"李明","age"=>15,"sex"=>"男"),
array("name"=>"赵亮","age"=>25,"sex"=>"男"),
array("name"=>"张月","age"=>22,"sex"=>"男"),
array("name"=>"王青","age"=>21,"sex"=>"女")
);
return $arr;
}


public function joinHtml($array){
if(count($array)==0){
User::isNotExist();
}
$d = 0;
$b ="<table border=\"1\" cellspacing=\"0\" cellpadding=\"10\">";
foreach($array as $t){
$d = $d+1;
$a = "<tr> 
<td>".$d."</td>
<td>".$t['name']."</td>
<td>".$t['age']."</td>
<td>".$t['sex']."</td>
</tr>";
$b = $b.$a;
}
$b = $b . "</table>";
return $b;

}
//下面是继承User这个类，上面的不允许改变。
class newUser extends User{



function get_both_sex_ages($sex, $age1,$age2){
   
   
  }
我需要在上面那个方法中调用$arr，不知道该怎么办，求解




------解决方案--------------------
基类Private派生类无法访问，这是面向对象的通用规则，要么基类直接提供访问private属性的public/protected接口给派生类使用，要么将属性直接设置为protected以便派生类的接口直接访问。