致命错误：函数名称必须是字符串学说和Zend 2

I have class contains Foreign key and i want insert this foreign key in my class

I do that script with doctrine 2 and zend 2 :

$geographicalarea = new Geographicalarea();
$geographicalarea = $entityManager()->getRepository('\Synchro\Entity\Geographicalarea')->find (array('idGeographicalArea'=> $idgeographicalarea ));

echo "Create ";
$department = new Department();
$department->setNamedepartment($data ['nameDepartment']);
$department->setCodedepartment($data ['codeDepartment']);
$department->setIdfkgeographicalarea($geographicalarea);

and I get this Error :

Fatal error: Function name must be a string in C:\wamp\www\imprimvert\module\Synchro\src\Synchro\Service\DepartmentManager.php on line 88

$geographicalarea = $entityManager()->getRepository('\Synchro\Entity\Geographicalarea')->find (array('idGeographicalArea'=> $idgeographicalarea ));

how can I resolved that ?

Thanks in advance

You wrote $entityManager() but I bet $entityManager is an object.

Remove the brackets ():

$geographicalarea = $entityManager->getRepository('\Synchro\Entity\Geographicalarea')->find (array('idGeographicalArea'=> $idgeographicalarea ));