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介绍
使用 PHP 的反射类 ReflectionClass，创建容器方便管理依赖注入。
代码
interface GrowthInterface
{
public function evolve();
}
class Agumon implements GrowthInterface
{
public function evolve()
{
echo "亚古兽进化\n";
}
}
class Gabumon implements GrowthInterface
{
public function evolve()
{
echo "加布兽进化\n";
}
}
class DigitalBaby
{
public $growth;
public function __construct(GrowthInterface $growth)
{
$this->growth = $growth;
}
}
class DigitalWorld
{
protected $instances = [];
protected $bind = [];
public function set($digitalBabyName, $digitalBaby)
{
if (!class_exists($digitalBaby)) {
echo '我不知道数码宝贝是什么';
} else {
$this->bind[$digitalBabyName] = $digitalBaby;
}
}
public function get($digitalBabyName, $digitalBaby)
{
if (isset($this->instances[$digitalBabyName])) {
return $this->instances[$digitalBabyName];
}
if (!isset($this->bind[$digitalBabyName])) {
echo $digitalBabyName."这只数码宝贝貌似不存在";
}
$reflect = new ReflectionClass($this->bind[$digitalBabyName]);
return $this->instances[$digitalBabyName] = $reflect->newInstanceArgs($digitalBaby);
}
}
$digitalWorld = new DigitalWorld();
$digitalWorld->set('Agumon','DigitalBaby');
$digitalWorld->set('Gabumon','DigitalBaby');
echo $digitalWorld->get('Agumon',[new Agumon])->growth->evolve();
echo $digitalWorld->get('Gabumon',[new Gabumon])->growth->evolve();
创建 digitalBaby.php，代码如上。
执行
$ php digitalBaby.php
亚古兽进化
加布兽进化
