在第二个例子中,PDO用它的常量填充MyClass,如何过滤掉它们？
class MyClass {
const PARAM_1 = 1;
const PARAM_2 = 2;
const PARAM_3 = 4;
function MyMethod() {
$reflector = new ReflectionClass(__CLASS__);
print_r($reflector->getConstants());
}
}
$myInstance = new MyClass();
$myInstance->MyMethod();
//returns:
//Array
//(
// [PARAM_1] => 1
// [PARAM_2] => 2
// [PARAM_3] => 4
//)
class MyClassPDO extends PDO {
const PARAM_1 = 1;
const PARAM_2 = 2;
const PARAM_3 = 4;
function MyMethod() {
$reflector = new ReflectionClass(__CLASS__);
print_r($reflector->getConstants());
}
}
$myInstancePDO = new MyClassPDO('sqlite::memory:');
$myInstancePDO->MyMethod();
//Array
//(
// [PARAM_1] => 1
// [PARAM_2] => 2
// [PARAM_3] => 4
// [PARAM_BOOL] => 5
// [PARAM_NULL] => 0
// [PARAM_INT] => 1
// [PARAM_STR] => 2
// [PARAM_LOB] => 3
// [PARAM_STMT] => 4
// [PARAM_INPUT_OUTPUT] => -2147483648
// [PARAM_EVT_ALLOC] => 0
// [PARAM_EVT_FREE] => 1
// [PARAM_EVT_EXEC_PRE] => 2
//....and so on
据我所知
function MyMethod() {
$reflector = new ReflectionClass(__CLASS__);
print_r(array_diff($reflector->getConstants(),$reflector->getParentClass()->getConstants()));
}
