<?php
class a
{
public function b() {}
}
class c extends a
{
public function b() {}
}
$class = new ReflectionClass('c');
$method = $class->getMethod('b');
var_dump($method->getDeclaringClass()->getName());
PD9waHAKCmNsYXNzIGEKewogICAgcHVibGljIGZ1bmN0aW9uIGIoKSB7fQp9CgpjbGFzcyBjIGV4dGVuZHMgYQp7CiAgICBwdWJsaWMgZnVuY3Rpb24gYigpIHt9Cn0KCiRjbGFzcyA9IG5ldyBSZWZsZWN0aW9uQ2xhc3MoJ2MnKTsKCiRtZXRob2QgPSAkY2xhc3MtPmdldE1ldGhvZCgnYicpOwoKdmFyX2R1bXAoJG1ldGhvZC0+Z2V0RGVjbGFyaW5nQ2xhc3MoKS0+Z2V0TmFtZSgpKTs=