PHP getter / setters(PHP getters / setters)
我正在尝试学习这个MVC OOP的东西，我偶然发现了一个奇怪的错误：
Fatal error: Call to undefined method Foo::stuff() in ...我的代码：
class Foo extends FooBase{ static $_instance; private $_stuff; public function getStuff($which = false){ if($which) return self::app()->_stuff[$which]; else return self::app()->_stuff; } public function setStuff($stuff){ self::app()->_stuff = $stuff; } public static function app(){ if (!(self::$_instance instanceof self)){ self::$_instance = new self(); } return self::$_instance; } } Foo::app()->stuff = array('name' => 'Foo', 'content' => 'whatever'); echo Foo::app()->stuff('name'); // <- this doesn't work...FooBase类看起来像这样：
class FooBase{ public function __get($name){ $getter = "get{$name}"; if(method_exists($this, $getter)) return $this->$getter(); throw new Exception("Property {$name} is not defined."); } public function __set($name, $value){ $setter = "set{$name}"; if(method_exists($this, $setter)) return $this->$setter($value); if(method_exists($this, "get{$name}")) throw new Exception("Property {$name} is read only."); else throw new Exception("Property {$name} is not defined."); } }所以，如果我理解正确，getter函数不能有参数？ 为什么？ 或者我在这里做错了什么？
I'm trying to learn this MVC OOP thingie and I stumbled across a weird error:
Fatal error: Call to undefined method Foo::stuff() in ...The code I have:
class Foo extends FooBase{ static $_instance; private $_stuff; public function getStuff($which = false){ if($which) return self::app()->_stuff[$which]; else return self::app()->_stuff; } public function setStuff($stuff){ self::app()->_stuff = $stuff; } public static function app(){ if (!(self::$_instance instanceof self)){ self::$_instance = new self(); } return self::$_instance; } } Foo::app()->stuff = array('name' => 'Foo', 'content' => 'whatever'); echo Foo::app()->stuff('name'); // <- this doesn't work...The FooBase class looks like this:
class FooBase{ public function __get($name){ $getter = "get{$name}"; if(method_exists($this, $getter)) return $this->$getter(); throw new Exception("Property {$name} is not defined."); } public function __set($name, $value){ $setter = "set{$name}"; if(method_exists($this, $setter)) return $this->$setter($value); if(method_exists($this, "get{$name}")) throw new Exception("Property {$name} is read only."); else throw new Exception("Property {$name} is not defined."); } }So if I understand correctly, a getter function can not have arguments? Why? Or am I doing something wrong here?
最满意答案
任何带有省略号的东西都被视为一种方法。 神奇的__get和__set方法仅适用于看起来像属性的东西。
对于方法魔术，请参阅__call() 。
Anything with ellipses is treated as a method. The magic __get and __set methods only work for things that look like properties.
For method magic, see __call().
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