Why does the system react strangely to an object received from json?

Question

Yii

Good afternoon.
1. I get Trying to get property of non-object when I try to compare 2. I output before that The system proudly displays
if( $resultJson->Success === false ) {...}
print_r($resultJson);die();

stdClass Object ( [ErrorCode] => [ErrorMessage] => [Success] => true )

I go back to the first step and get Trying to get property of non-object
3. I output The system issues I go back to the first step and get Trying to get property of non-object. 4. Making crutches
print_r($resultJson->Success);die();
true

$temp = $resultJson->Success;
print_r($temp);die();

Returned true.
5. Tried to compare and got Trying to get property of non-object. Has anyone come across this before?
if( $temp === false ) {

Answer 1

Telepathy: All this code in a loop. The first element of the loop is good, so die is good. If die is removed, then the first element passes, and the second is null, so it falls.