I don't know why it's not documented anywhere, when you (accidentally) pass an abstract class name you'll get the instance of Error class instead of ReflectionException class.
<?php
function reflect(string $class) {
try {
(new ReflectionClass($class))->newInstance();
} catch (Throwable $e) {
echo get_class($e) . ' : ' . $e->getMessage() . PHP_EOL;
}
}
abstract class A {}
class B {
private function __construct() {}
}
reflect(A::class); // => Error : Cannot instantiate abstract class A
reflect(B::class); // => ReflectionException : Access to non-public constructor of class B
ReflectionClass::newInstance
(PHP 5, PHP 7, PHP 8)
ReflectionClass::newInstance — Creates a new class instance from given arguments
Description
Creates a new instance of the class. The given arguments are passed to the class constructor.
Parameters
-
args -
Accepts a variable number of arguments which are passed to the class constructor, much like call_user_func().
Return Values
Errors/Exceptions
A ReflectionException if the class constructor is not public.
A ReflectionException if the class does not have a constructor
and the args parameter contains one or more parameters.
See Also
- ReflectionClass::newInstanceArgs() - Creates a new class instance from given arguments
- ReflectionClass::newInstanceWithoutConstructor() - Creates a new class instance without invoking the constructor
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User Contributed Notes 2 notes
feryardiant at pm dot me ¶
2 years ago
glen at delfi dot ee ¶
8 years ago
looks like reflection class newInstance creates in memory representation of code where values are used, so using reference as constructor signature, you can not use this method.
as the same input if called via new, or new $class works, but not via reflection:
class a {
public function __construct(&$a, $c) {
}
}
// this works
$A = new stdClass();
$a = new a($A, 11);
// also this works
$classname = "a";
$a = new $classname($A, 10);
// but this fails:
$r = new ReflectionClass("a");
$r->newInstance($A, 10);
PHP Warning: Parameter 1 to a::__construct() expected to be a reference, value given in reflection.php on line 15
PHP Warning: ReflectionClass::newInstance(): Invocation of a's constructor failed in reflection.php on line 15
