[英]How to access class properties from parent abstract class to a static method?
Here is a simple example. 这是一个简单的例子。
abstract class A{
protected $foo = 'I m foo';
}
class B extends A{
static function sayFoo(){
// get the value of $foo here.
}
}
I can pass foo as a constant, or change the function from static to normal, or declare sayFoo
inside the parent class but I want to check if there is another way first without using Reflection 我可以将foo作为常量传递,或将函数从静态更改为普通,或在父类中声明sayFoo
,但我想先检查是否有其他方法而不使用Reflection
You can't access the protected $foo
property statically because it isn't declared static. 您不能静态访问protected $foo
属性,因为它不是静态声明的。 However you could if it was an object. 但是,如果它是一个对象,则可以。 One way to go about this is instantiate the class inside of your static function. 一种解决方法是在静态函数内部实例化类。
<?php
abstract class A{
protected $foo = 'I m foo';
}
class B extends A{
static function sayFoo(){
// get the value of $foo here.
$bar = new self();
echo $bar->foo;
}
}
B::sayFoo(); //prints 'I m foo';
?>
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