本文介绍了PHP:empty不使用getter方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个getter方法,如
I have a "getter" method like
function getStuff($stuff){
return 'something';
}
> stuff),我总是得到 FALSE
,但我知道 $ this-> stuff
if I check it with empty($this->stuff)
, I always get FALSE
, but I know $this->stuff
returns data, because it works with echo.
如果我用!isset($ this-> stuff) code>我得到正确的值,条件从不执行...
and if I check it with !isset($this->stuff)
I get the correct value and the condition is never executed...
这里是测试代码:
class FooBase{
public function __get($name){
$getter = 'get'.ucfirst($name);
if(method_exists($this, $getter)) return $this->$getter();
throw new Exception("Property {$getter} is not defined.");
}
}
class Foo extends FooBase{
private $my_stuff;
public function getStuff(){
if(!$this->my_stuff) $this->my_stuff = 'whatever';
return $this->my_stuff;
}
}
$foo = new Foo();
echo $foo->stuff;
if(empty($foo->stuff)) echo 'but its not empty:(';
if($foo->stuff) echo 'see?';
推荐答案
empty c $ c>将首先调用
__ isset()
,只有当它返回 true
才会调用 __get()
。
empty()
will call __isset()
first, and only if it returns true
will it call __get()
.
实现 __ isset()
code> true 。
Implement __isset()
and make it return true
for every magic property that you support.
function __isset($name)
{
$getter = 'get' . ucfirst($name);
return method_exists($this, $getter);
}
这篇关于PHP:empty不使用getter方法的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!