<?php
error_reporting(E_ALL);
trait Hello
{
public function sayHello()
{
echo 'Hello ';
}
}
trait World
{
public function sayWorld()
{
echo 'World';
}
}
class MyHelloWorld
{
use Hello, World;
public function sayExclamationMark()
{
echo '!';
}
}
$o = new MyHelloWorld();
$o->sayHello();
$o->sayWorld();
$o->sayExclamationMark();
error_reporting(E_ALL);
abstract class Base
{
public abstract function sayHello(array $a);
}
class SubClass extends Base
{
public function sayHello(array $a)
{
echo "World!\n";
}
}
$s = new SubClass();
$s->sayHello(array());
trait SayWorld
{
public function sayHello(Base $d)
{
echo 'World!';
}
}
class MyHelloWorld extends Base
{
use SayWorld;
}
$o = new MyHelloWorld();
$o->sayHello(array());
?>
--EXPECTF--
Fatal error: Declaration of SayWorld::sayHello() must be compatible with Base::sayHello(array $a) in %s on line %d, position %d