php 多继承的几种常见实现方法示例

时间:2021-11-24 08:34:40

本文实例讲述了php 多继承的几种常见实现方法。分享给大家供大家参考,具体如下:

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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();

运行结果:

Array
(
    [0] => Child Object
        (
            [_parents:protected] => Array
                (
                    [0] => Parent1 Object
                        (
                        )

                    [1] => Parent2 Object
                        (
                        )

                )

        )

)

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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");

运行结果:

接口继承,要实现所有相关抽象方法!
模特正在跳舞!

希望本文所述对大家PHP程序设计有所帮助。

原文链接:https://blog.csdn.net/ztblog/article/details/80171393