php关闭对象如何阅读呢？

Question

I have this code but I am stuck...

$my_var = function (){

  return array('hello you');
};

var_dump($my_var); // returns object(Closure)#2 (0) { }

how do I echo $my_var ?

I would assume it would be echo $my_var[0] ; but this does not work.

Fatal error: Cannot use object of type Closure as array in ...

Answer 1

A closure is a function. Therefore you have to call it, like this :

$myvar();

Since php5.4 with Array Access:

 echo   $myvar()[0];

Answer 2

$my_var represents a function. You need to call it first to get the return value.

Answer 3

尝试print_r它会打印数组或对象

print_r($my_var);