Description:
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There is written in the manual that empty($object) == TRUE, where $object has empty properties. 

>> empty() returns FALSE if var has a non-empty or non-zero value. In otherwords, "", 0, "0", NULL, FALSE, array(), var $var;, and objects with empty properties, are all considered empty. TRUE is returned if var is empty. <<

But IMHO there is an error if $object is instance of class A {}.
I think the A's instance has no properties hence it is an "object with empty properties". 
So why empty($a) == FALSE where $a = new A? 

It seems that empty() does never return TRUE.

BTW: What does "var $var;" mean?


Reproduce code:
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class A {} 
$a = new A;
var_dump(empty($a));

Expected result:
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bool(true)

Actual result:
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bool(false)