根据描述，按照面向对象的方式来定义类或者接口：

1   交通警察执法拦截闯红灯的奥迪汽车

2   刑警于今日7月17日凌晨抓捕了江苏常熟纵火案嫌疑犯

 3   青蛙一般在田间捕捉害虫；蜻蜓能飞，一般在空中捕捉害虫；啄木鸟也能飞，一般在树上捕捉害虫

/**
 * 青蛙一般在田间捕捉害虫；蜻蜓能飞，一般在空中捕捉害虫；啄木鸟也能飞，一般在树上捕捉害虫；
 */
abstract class DongWu{
    protected $mingZi;
    protected $diDian;
    public function __construct($mingZi, $diDian){
        $this->diDian = $diDian;
        $this->mingZi = $mingZi;
    }
    public function zhuoHaiChong(){
        echo $this->mingZi.$this->diDian.‘捕捉害虫‘;
    }
}
interface Fly{
    public function fly();
}
class QingWa extends DongWu{
//    public function zhuoHaiChong(){
//        echo $this->mingZi.$this->diDian.‘捕捉害虫‘;
//    }
}
class QingTing extends DongWu implements Fly {
    public function fly(){
        return $this->mingZi.‘能飞，‘;
    }
    public function zhuoHaiChong(){
        echo $this->fly();
        parent::zhuoHaiChong();
    }
}
class ZhuoMuNiao extends DongWu implements Fly{
    public function fly(){
        return $this->mingZi.‘能飞，‘;
    }
    public function zhuoHaiChong(){
        echo $this->fly();
        parent::zhuoHaiChong();
    }
}

$qw = new QingWa(‘青蛙‘, ‘在田间‘);
$qw->zhuoHaiChong();
echo ‘<br><br>‘;
$qt = new QingTing(‘蜻蜓‘, ‘在空中‘);
$qt->zhuoHaiChong();
echo ‘<br><br>‘;
$zmn = new QingTing(‘啄木鸟‘, ‘在树上‘);
$zmn->zhuoHaiChong();

PHP面向对象练习