如何检测匿名类的实例？

Question

Since PHP7, we have anonymous classes .

How can we know if an $instance is an instance of an anonymous class?

Answer 1

Using Reflection

$instance = new class {};

$testInstance = new ReflectionClass($instance);
var_dump($testInstance->isAnonymous());

EDIT

Of course, given that you must be running PHP7 for anonymous classes anyway, wrap it up into a one-liner

var_dump((new ReflectionClass($instance))->isAnonymous());

Answer 2

You can try this one: Here

<?php 
class TestClass {}
$anonClass = new class {};

$normalClass = new ReflectionClass('TestClass');
$anonClass  = new ReflectionClass($anonClass);

var_dump($normalClass->isAnonymous());
var_dump($anonClass->isAnonymous());
?>

Output:

bool(false) bool(true)