Hide specific class fields from print_r or var_dump

Question

Is it possible to hide a specific class fields from print_r ?

Answer 1

I built upon Meir's solution to extend it to work with multiple objects of the class. Here is my solution:

hiddenVarKey) {
           $this->hiddenVarKey = sha1(rand());
        }
        if(!empty($set_to_new_val)){
           self::$hiddenVarMap[$this->hiddenVarKey] = $set_to_new_val;
        }

        return self::$hiddenVarMap[$this->hiddenVarKey];
    }
}

$test = new myClass;

$test->visibleVar = range(1,5);
print_r($test);
print_r($test->visibleVar);


$test->hiddenVar(range(100,105));
print_r($test);
print_r($test->hiddenVar());

?>