The content of this article is about PHP's private permission control, which has certain reference value. Now I share it with everyone. Friends in need can refer to it
//private permission control
// ===Code part 1===
class Human {
public $mood = ''; // 心情，公有
private $money = 1000; // 钱，私有
public function showMoney() {
return $this->money;
} private function secret() {
echo '我小时候偷吃过一块肉';
} public function tellMe() {
$this->secret();
}
}
$lisi = new Human();
$lisi->mood = 'happy';
echo $lisi->mood,'<br >';
//钱定义为私有属性，在类Human{}外面调用，调用失败
//echo $lisi->money;
//$lisi-money = 500;
echo $lisi->showMoney();
echo '<br >';/*
showMoney是公共的，在此行可以调用.
showMoney中的 return $this->money;
这一句运行的环境是在 类{}的内部，因此有权限访问 money属性
*///$lisi->secret(); //报错$lisi->tellMe();
// 可以调用，因为在通过函数在类内调用的echo '<hr >';/*
Summary: private permission control
can only be called within class {}.
Walk out {}, it cannot be adjusted.
*/
//Permission control bug
// ===Code part 2===
class Human2 {
private $money = 1000; public function getMoney($people) {
return $people->money;
} public function setMoney($people) {
$people->money -= 500;
}
}$zhangsan = new Human2();$lisi = new Human2();//echo $lisi->money;
//报错// 让李四去打探张三的钱echo $lisi->getMoney($zhangsan),'<br >';
//1000// 让李四去改变张三的钱$lisi->setMoney($zhangsan);
//减500echo $lisi->getMoney($zhangsan),'<br >';
//剩500print_r($zhangsan);/*
The strange thing is that
zhangsan’s money should be affected by zhangsan calling getMoney and setMoney.
But the principle when talking about private permission control is Compliant:
That is:
The call of getMoney() public has the right
getMoney is in the class {} and has the right to read the private property money
The call of setMoney() public has The right
setMoney is in class {} and has the right to modify zhangsan’s private attribute money
*/
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