Description:
------------
Hello,

it seems that the recursion detection for var_dump() doesn't work when using objects with __debugInfo(), which causes an infinite loop. The problem seems to be located in ext/standard/var.c:129:

		myht = Z_OBJDEBUG_PP(struc, is_temp);
		if (myht && ++myht->nApplyCount > 1) {
			PUTS("*RECURSION*\n");
			--myht->nApplyCount;
			return;
		}

Z_OBJDEBUG_PP() gives either a hashtable containing all properties of an object or, if __debugInfo() is available, the hashtable returned by that method. Since this hashtable is recreated on every call to __debugInfo(), changing it's nApplyCount value won't help for detecting object recursion. Probably the objprop hashtable should always be used for recursion detection.

Test script:
---------------
<?php

class A {
        public $x = null;

        public function __debugInfo() {
                return ["x" => $this->x];
        }
}

class B {
        public $y = null;

        public function __debugInfo() {
                return ["y" => $this->y];
        }
}

$a = new A;
$a->x = new B;
$a->x->y = $a;

var_dump($a);

Expected result:
----------------
object(A)#1 (1) {
  ["x"]=>
  object(B)#2 (1) {
    ["y"]=>
    *RECURSION*
  }
}

Actual result:
--------------
Infinite loop