需要在PHP上“动态”调用静态属性

Question

I'm having the following issue.

Inside my Banner class I have:

public static $flag_status = array(
                               'Unpublished'
                          ,    'Published'
                          );

Out of the Banner class, I have an array that contains the 'flag_status' value which represents the attribute on the Banner class.

Let's suppose that I'm getting this value from the array and storing on a variable like this:

$name_attr = 'flag_status';

I need to call:

Banner::$name_attr; 

And it should return the same as calling:

Banner::$flag_status;

Is it possible to do?

Answer 1

Use two dollar signs:

Banner::$$name_attr;

Example:

class Foo {
    public static $flag_status = array( 'foo', 'bar' );
}

$name_attr = 'flag_status';

print_r(Foo::$$name_attr);

Produces:

Array
(
    [0] => foo
    [1] => bar
)