如何将对象与箭头运算符和自定义变量结合起来

Question

I'm working with Laravel 8 and I need to concatenate an object with an arrow operator and then a custom variable like this:

$fullStr = "product_attr_correction";
dd($product->$fullStr); // return null incorrectly

So basically, at the table products I have a column name product_attr_correction and it already has a value in it.

But the result of dd($product->$fullStr) return null incorrectly.

But when I do dd($product->product_attr_correction) , I get the proper result value.

So the question is, how can I combine an object with an arrow operator and then a custom variable properly?

Answer 1

使用此语法：

$product->{$fullStr}