本文实例讲述了php类的定义与继承用法。分享给大家供大家参考。具体如下：

<?php/* * class */ class people {  public $name;  public $age;  function __construct($namec,$agec) {    $this->name = $namec;    $this->age = $agec;  }  protected function getmessage() {    return "姓名：".$this->name."<br/>"."年龄：".$this->age;  }  function __tostring() {    return "姓名：".$this->name."<br/>"."年龄：".$this->age;  }  function __destruct() {    echo "<br/> I am dead！";  }  function __call($key,$args) {    echo "<br/>","你调用的方法名不存在：$key","<br/>";    echo "你调用的参数是：",var_dump($args);  }  final function getf() {    echo "I am getf";  } } class xinxin extends people {  function getname() {    echo $this->getmessage();    echo "<br/>";    echo parent::getmessage();    echo "<br/>";    return "I am xinxin";  }  function getmessage() {    return "I am zilei getmessage <br/>";  }  function getff() {    echo "I am new getf";  } }$pp = new people("小弟","33");//$pp->name = "小明";//$pp->age = "88";echo $pp->name;echo "   ";echo $pp->age;echo "<br/><br/>";$xx = new xinxin("小小","13");echo $xx->getname();?>

希望本文所述对大家的php程序设计有所帮助。