runaurufu is not quite right, get_class_vars() does not return protected params, while this one does.
Thus it's extremely useful when having an abstract parent class and protected properties overriding in children.
For example, I use a class factory and one of the children has some static test methods that still need to output a paramether name, like $this->name, etc. With this example code, one can use static::getNotStaticProperty('name'), but not get_class_vars('name').
Try it:
trait static_reflector {
/*
* a purely static function that returns default properties of the non-static instance of the same class
*/
static protected function getNonStaticProperty($key) {
$me = get_class();
$reflectionClass = new \ReflectionClass($me);
$properties_list = $reflectionClass->getDefaultProperties();
if (isset($properties_list[$key]))
return $var_name = $properties_list[$key];
else throw new RuntimeException("BUG: Unable to reflect non-static property '{$key}' from default properties of class {$me}");
}
}
class a {
use \static_reflector;
protected $key_a = 'test ok';
public static function test() {
echo static::getNonStaticProperty('key_a')."\n";
try {
print static::getNonStaticProperty('key_b');
echo "FAIL No exception thrown";
} catch (RuntimeException $e) {
echo "OK ".$e->getMessage();
}
}
}
echo get_class_vars('a')['key_a'];
a::test();
this will return:
Notice: Undefined index: key_a in ...
test ok
OK BUG: Unable to reflect non-static property 'key_b' from default properties of class a
ps: Yes, this is copied from a unit test.
