performance - PHP, Is a copy of object created to be eliminated in some cases? -

i have doubts php objects behave after have been deleted in cases, doing tests. code:

class itemrecord {     private $id;     protected $name;      public function __contruct($pid, $pname)     {         $this->id = $pid;         $this->name = $pname;     }     public function setname($pname)     {         $this->name = $pname;     }     public function getname()     {         return $this->name;     } } 

i create objects of itemrecord class , then, append them object list (an array):

$objlist = array();  $obj1 = new itemrecord("1", "object 1"); $objlist[] = $obj1; $obj2 = new itemrecord("2", "object 2"); $objlist[] = $obj2; 

if change property in 'original' object, example:

$obj1->setname("foo"); 

and i'll try show content of 'linked' element in list original object:

echo($objlist[0]->getname()); //-> of course, displays "foo" 

so if delete object should not exist in list anymore

unset($obj1); unset($obj2); 

but it's not that!

echo($objlist[0]->getname()); 

it continues displaying "foo"!, , the object continues existing well...

so question is: in case, when delete object, copy operation occurs @ delete time?

there other curious cases strange behavior,

updated: after answers , things have been talked in comments. maybe great if unset() function return result of deleting. example: 'true', if var content or object removed.

to answer question : no.

when unset value removing reference variable not deleting that. deleted when there no reference variable exits.

from php documentation (http://php.net/manual/en/function.unset.php)

unset() destroys specified variables