PHP oop如何调用动态函数名称

Question

I have a method display() in the book class.

$name = 'display()';
$book = new Book('PHP Object-Oriented Solutions', 300);

$book->$name;

How can i call display method using $book->$name

Answer 1

You need to tell PHP that you're trying to execute a method, not in the variable itself, but within the actual code:

$name = 'display';
$book = new Book('PHP Object-Oriented Solutions', 300);

$book->$name();

Otherwise, as you have seen, it will treat $name as a property name, and rightly so ... If you have both a property and a method named 'display', there wouldn't be a way to distinguish between the two using what you've tried.