How to add functions in entity manager configuration doctrine in zend framework 3 - zend-framework

Question

I have currently a controller and a controller factory
AbcControllerFactory
public function __invoke(ContainerInterface $container, $requestedName, array $options = null){
$entityManager = $container->get("doctrine.entitymanager.orm_default");
return new AbcController($entityManager);
}
And AbcController
private $entityManager;
public function __construct($entityManager){
$this->entityManager = $entityManager;
}
I am trying to use this doctrine library
doctrine library for json functions
but the only issue is I'm stuck in adding these functions
$config = new \Doctrine\ORM\Configuration();
$config->addCustomStringFunction(DqlFunctions\JsonExtract::FUNCTION_NAME, DqlFunctions\JsonExtract::class);
$config->addCustomStringFunction(DqlFunctions\JsonSearch::FUNCTION_NAME, DqlFunctions\JsonSearch::class);
I'm fairly new to this doctrine bit. Can anyone help how should I add these function in the existing entity manager configuration
This is my local.php file where all information is stored
return [
"doctrine" => [
"connection" => [
"orm_default" => [
"driverClass" => PDOMySqlDriver::class,
"params" => [
"driver" => "pdo_mysql",
"dsn" => "mysql:dbname=abc;host=localhost;charset=utf8",
"host" => "localhost",
"user" => "root",
"password" => "",
"dbname" => "abc",
]
],
],
],
];

Answer 1

Okay this is a bit sluggish from me. However, I found out you could add function like this in controller:
$this->entityManager->getConfiguration()->addCustomStringFunction(DqlFunctions\JsonExtract::FUNCTION_NAME, DqlFunctions\JsonExtract::class);
$this->entityManager->getConfiguration()->addCustomStringFunction(DqlFunctions\JsonSearch::FUNCTION_NAME, DqlFunctions\JsonSearch::class);