


PHP uses method overloading to implement get and set methods that dynamically create attributes.
这篇文章主要介绍了PHP使用方法重载实现动态创建属性的get和set方法,使用本章方法可以在一个类中不用在写大量的set方法或get方法,需要的朋友可以参考下。
在PHP中,我们不能够直接通过方法名相同,签名不同的方法来实现方法重载,因为PHP是弱数据类型,不能很好的区分签名。但是,可以在PHP的类中运用__call()方法来实现方法重载。当调用一个类中并不存在的方法时,会自动调用__call()方法,其形式为__call($name,$arguments) 其中$name是方法的名称,$arguments是一个数组类型的参数。
下面的例子是使用PHP的方法重载来动态创建get和set方法。(在面向对象编程中,一个类中的属性会使用get和set来赋值,但是如果一个类中有太多的属性,比如30个,那么如果不用方法重载的话,我们就需要写30个set方法,30个get方法,自已一边慢慢写去吧。。。)
<?php class person { private $name; private $age; private $address; private $school; private $phonenum; public function __call($method,$args) { $perfix=strtolower(substr($method,0,3)); $property=strtolower(substr($method,3)); if(empty($perfix)||empty($property)) { return; } if($perfix=="get"&&isset($this->$property)) { return $this->$property; } if($perfix=="set") { $this->$property=$args[0]; } } } $p=new person(); $p->setname('lvcy'); $p->setage(23); $p->setAddress(chengdu); $p->setschool('uestc'); $p->setphonenum('123456'); echo $p->getname().'\\n'; echo $p->getage().'\\n'; echo $p->getaddress().'\\n'; echo $p->getschool().'\\n'; ?>
通过__Call()方法很容易的解决了这个问题,而不是编写每个属性的get set方法。
以上就是本章的全部内容,更多相关教程请访问php编程从入门到精通全套视频教程!

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