ReflectionClass::implementsInterface()

(PHP 5, PHP 7)

接口的实现

说明

检查它是否实现了一个接口（interface）。

参数

接口（interface）的名称。

返回值

成功时返回TRUE，或者在失败时返回FALSE。

参见

• ReflectionClass::isInterface() 检查类是否是一个接口（interface）
• ReflectionClass::isSubclassOf() 检查是否为一个子类
• interface_exists() 检查接口是否已被定义
• Object Interfaces

interface Factory
{
  public function sayHello();
}
class ParentClass implements Factory
{
  public function sayHello()
  {
    echo "hello\n";
  }
}
class ChildrenClass extends ParentClass
{
}
$reflect = new ReflectionClass('ParentClass');
var_dump($reflect->implementsInterface('Factory'));
$second_ref = new ReflectionClass('ChildrenClass');
var_dump($second_ref->isSubclassOf('ParentClass'));
$third_ref = new ReflectionClass('Factory');
var_dump($third_ref->isInterface());
//can not be called as static
var_dump(ReflectionClass::isInterface('Factory'));
die;
//#result
bool(true)
bool(true)
bool(true)
PHP Fatal error: Non-static method ReflectionClass::isInterface() cannot be called statically

Note that this method also returns true when the thing you're reflecting is the interface you're checking for: 

//checks that whether class Fruit implements interface apple or not 
interface Apple {
  
  function taste();
}
class Fruit implements Apple {
  
  function taste() {
    echo "Seet";
  }
}
$obj=new ReflectionClass('Fruit');
var_dump($obj->implementsInterface('Apple')); //Here it will checks that whether class Fruit implements interface apple or not

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