Getting static property from a class with dynamic class name in PHP

Question

I have this:

• one string variable which holds the class name ($classname)
• one string variable with holds the property name ($propert

Answer 1

To return a variable value that is set by a Static Variable you need to call:

$static_value = constant($classname.'::'.$propertyname);

Check out the documentation :: PHP Constant Documentation

Answer 2

'eval' looks so close to 'evil', and I hate using it and/or seeing it in code. With a few ideas from other answers, here's a way to avoid it even if your php isn't 5.3 or higher.

Changed to reflect testing based on a comment.

class A {
    static $foo = 'bar';
}

A::$foo = 'baz';
$a = new A;

$class = get_class($a);
$vars = get_class_vars($class);

echo $vars['foo'];

Outputs 'baz'.

Answer 3

One thing I noticed is that you can't set variables which are protected in static classes as the eval() command runs in a scope outside the class. The only thing to get around this would be to implement a static method inside the/every class which runs the eval(). This method could be protected as the call_user_func() [to call the setter method] also runs from inside the class.

Answer 4

get_class_vars is not same as get_object_vars.

I think get_clas_vars should return the original property values.

Answer 5

You should be able to do something like:

eval("echo $classname::$propertyname;");

I just did a quick test and got this to work for me. Not sure if there's a better way or not, but I wasn't able to find one.