php 多继承的几种常见实现方法示例

class Parent1 {
  function method1() {}
  function method2() {}
}
class Parent2 {
  function method3() {}
  function method4() {}
}
class Child {
  protected $_parents = array();
  public function Child(array $parents=array()) {
    $this- _parents = $parents;
  }
  public function __call($method, $args) {
    // 从“父类"中查找方法
    foreach ($this- _parents as $p) {
      if (is_callable(array($p, $method))) {
        return call_user_func_array(array($p, $method), $args);
      }
    }
    // 恢复默认的行为，会引发一个方法不存在的致命错误
    return call_user_func_array(array($this, $method), $args);
  }
}
$obj = new Child(array(new Parent1(), new Parent2()));
print_r( array($obj) );die;
$obj- method1();
$obj- method3();

interface testA{
  function echostr();
}
interface testB extends testA{
  function dancing($name);
}
class testC implements testB{
  function echostr(){
    echo "接口继承，要实现所有相关抽象方法！";
    echo "<br ";
  }
  function dancing($name){
    echo $name."正在跳舞！";
  }
}
$demo=new testC();
$demo- echostr();
$demo- dancing("模特");