使用框架: ci。。。
参考官网信息
参考官网示例代码即可
1 <?php
2 class PropertyTest {
3 /** 被重载的数据保存在此 */
4 private $data = array();
5
6
7 /** 重载不能被用在已经定义的属性 */
8 public $declared = 1;
9
10 /** 只有从类外部访问这个属性时，重载才会发生 */
11 private $hidden = 2;
12
13 public function __set($name, $value)
14 {
15 echo "Setting '$name' to '$value'\n";
16 $this->data[$name] = $value;
17 }
18
19 public function __get($name)
20 {
21 echo "Getting '$name'\n";
22 if (array_key_exists($name, $this->data)) {
23 return $this->data[$name];
24 }
25
26 $trace = debug_backtrace();
27 trigger_error(
28 'Undefined property via __get(): ' . $name .
29 ' in ' . $trace[0]['file'] .
30 ' on line ' . $trace[0]['line'],
31 E_USER_NOTICE);
32 return null;
33 }
34
35 public function __isset($name)
36 {
37 echo "Is '$name' set?\n";
38 return isset($this->data[$name]);
39 }
40
41 public function __unset($name)
42 {
43 echo "Unsetting '$name'\n";
44 unset($this->data[$name]);
45 }
46
47 /** 非魔术方法 */
48 public function getHidden()
49 {
50 return $this->hidden;
51 }
52 }
53
54
55 echo "<pre>\n";
56
57 $obj = new PropertyTest;
58
59 $obj->a = 1;
60 echo $obj->a . "\n\n";
61
62 var_dump(isset($obj->a));
63 unset($obj->a);
64 var_dump(isset($obj->a));
65 echo "\n";
66
67 echo $obj->declared . "\n\n";
68
69 echo "Let's experiment with the private property named 'hidden':\n";
70 echo "Privates are visible inside the class, so __get() not used...\n";
71 echo $obj->getHidden() . "\n";
72 echo "Privates not visible outside of class, so __get() is used...\n";
73 echo $obj->hidden . "\n";
74 ?>
标签：__,obj,变量,成员,echo,return,php,data,name From： https://www.cnblogs.com/supermarx/p/17867649.html