Call private/protected PHP methods. Danger zone. Don't do this at home.

call-private-methods.php

<?php

// we'll do nasty things to this instance
$instance = new Foo;

// pass instance or class name
$method = new ReflectionMethod($instance, 'privateMethod');
$method = new ReflectionMethod('Foo', 'privateMethod');

// milkshakes to the yard
$method->setAccessible(true);

// pass context then arguments as variadic
$method->invoke($instance, 'arg1', 'arg2');
$method->invoke(new Foo, 'arg1', 'arg2');

// arguments as array
$method->invokeArgs($instance, ['arg1', 'arg2']);

// summary
$method = new ReflectionMethod($instance, 'privateMethod');
$method->setAccessible(true);
$method->invoke($instance, 'arg1', 'arg2');

// now with static method
$method = new ReflectionMethod('Foo', 'privateStaticMethod');
$method->setAccessible(true);
$method->invoke(null, 'arg1', 'arg2'); // here we pass null for context