Description:
------------
The rules under which a class member is reported to "exist" for method_exists() property_exists() are inconsistent.

property_exists will look into all members visible from inside a given class, be it private, public or protected, but it won't report *parent class private properties* as existing for that class.

method_exists will report a parent class private method as existing for the child class, but the child class has no access to it internally.

This is not a new problem in PHP7, but it's an issue in general. I believe the property_exists() behavior is correct, and method_exists() causes unexpected results.

Test script:
---------------
class BobSenior {
	private $a;
	protected $b;
	
	private function a() {}
	protected function b() {}
}

class BobJunior extends BobSenior {
	private $c;
	protected $d;
	
	private function c() {}
	protected function d() {}
}

$senior = new BobSenior();
$junior = new BobJunior();

var_dump(property_exists($senior, 'a')); // bool(true) -> EXPECTED
var_dump(method_exists($senior, 'a')); // bool(true) -> EXPECTED

var_dump(property_exists($senior, 'b')); // bool(true) -> EXPECTED
var_dump(method_exists($senior, 'b')); // bool(true) -> EXPECTED

var_dump(property_exists($senior, 'c')); // bool(false) -> EXPECTED
var_dump(method_exists($senior, 'c')); // bool(false) -> EXPECTED

var_dump(property_exists($senior, 'd')); // bool(false) -> EXPECTED
var_dump(method_exists($senior, 'd')); // bool(false) -> EXPECTED

var_dump(property_exists($junior, 'a')); // bool(false) -> EXPECTED
var_dump(method_exists($junior, 'a')); // bool(true) -> *NOT* EXPECTED (EXPECTED = false)

var_dump(property_exists($junior, 'b')); // bool(true) -> EXPECTED
var_dump(method_exists($junior, 'b')); // bool(true) -> EXPECTED

var_dump(property_exists($junior, 'c')); // bool(true) -> EXPECTED
var_dump(method_exists($junior, 'c')); // bool(true) -> EXPECTED

var_dump(property_exists($junior, 'd')); // bool(true) -> EXPECTED
var_dump(method_exists($junior, 'd')); // bool(true) -> EXPECTED

Expected result:
----------------
Please check comments for expected results.

Actual result:
--------------
Please check comments for actual results.