arrays - test object is null in php -

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i want test if object null or not, have follwing code 

$listcontact = array(); $contact=$ms->search('email','test@live.fr'); var_dump(($contact));

and result if $listcontact not null give follow

object(stdclass)[6] public 'item' => string 'dfdfsd' (length=7)

in case it's null , following result

object(stdclass)[6]

how can test variable $listcontact exists or not? i've tried is_null , (empty() not work

use function is_null() follows : 

is_null($listcontact);

the return value :

returns true if var null, false otherwise.

edit

also can use : 

  if ( !$your_object->count() ){         //null   }

for more information see answers

try using array_filter()

$emptyarray= array_filter($listcontact);  if (!empty($emptyarray)){  } else{     //nothing there }

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