How to check that an object is empty in PHP?

Question

How to find if an object is empty or not in PHP.

Following is the code in which $obj is holding XML data. How can I check if it's empty or not?

My code:

$obj = simplexml_load_file($url);

Answer 1

You can cast to an array and then check if it is empty or not

$arr = (array)$obj;
if (!$arr) {
    // do stuff
}