I'm trying to use constant as a function paramter, is it possible to check type of this constant.
Example of what I want:
class ApiError {
const INVALID_REQUEST = 200;
}
class Response {
public function status(ApiError $status) {
//function code here
}
}
USE:
$response = new Response();
$response->status(ApiError::INVALID_REQUEST);
This shoud check that given $status is constant of class ApiError. Is something like this possible?
You can use in_array() to test against whitelisted values, which is a recommended strategy whenever you need to validate input to a specific value set:
// Test if it is in an array of valid status constants...
$valid_statuses = array(
ApiError::INVALID_REQUEST,
ApiError::INVALID_SOMETHINGELSE,
ApiError::STATUS_OK
);
if (in_array($status, $valid_statuses)) {
// it's an acceptable value
}
To whitelist all constants of a class, you could use reflection and retrieve the constants from ApiError via ReflectionClass::getconstants()
$refl = new ReflectionClass('ApiError');
$valid_statuses = $refl->constants();