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This is the code & its output I used to draw the inference below: class a { public $var1; public $var2; } $obj0 = new a; var_dump($obj0); class b { public $var1; public $var2; public $var3; } $obj1 = new b; var_dump($obj1); $obj2 = new stdClass; var_dump($obj2); $obj3 = new stdClass; var_dump($obj3); $obj4 = new stdClass; var_dump($obj4); $obj5 = new stdClass; var_dump($obj5); var_dump(new stdClass); $obj6 = new stdClass; var_dump($obj6); The output: object(a)#1 (2) { ["var1"]=> NULL ["var2"]=> NULL } object(b)#2 (3) { ["var1"]=> NULL ["var2"]=> NULL ["var3"]=> NULL } object(stdClass)#3 (0) { } object(stdClass)#4 (0) { } object(stdClass)#5 (0) { } object(stdClass)#6 (0) { } object(stdClass)#7 (0) { } object(stdClass)#7 (0) { } The #<some-number> next to the line object(someClass) in var_dump of an object is actually #<count> . Where, count is the number of objects / zval's for objects irrespective of which class it belongs to that has been created till now. Which keeps getting incrementing for every object created & gets decremented by 1 when a refcount of a zval reaches zero i.e. Garbage Collection. Am I right?

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