PHP - warning - Undefined property: stdClass - fix?

I get this warning in my error logs and wanted to know how to correct this issues in my code. Warning: PHP Notice: Undefined property: stdClass::$records in script.php on line 440 Some Code: ``` // Parse object to get account id's // The response doesn't have the records attribute sometimes. $role_arr = getRole($response->records); // Line 440 ``` Response if records exists ``` stdClass Object ( [done] => 1 [queryLocator] => [records] => Array ( [0] => stdClass Object ( [type] => User [Id] => [any] => stdClass Object ( [type] => My Role [Id] => [any] => <sf:Name>My Name</sf:Name> ) ) ) [size] => 1 ) ``` Response if records does not exist ``` stdClass Object ( [done] => 1 [queryLocator] => [size] => 0 ) ``` I was thinking something like array_key_exists() functionality but for objects, anything? or am I going about this the wrong way?