责任链模式

责任链模式

<?php$lev = $_GET['report'] + 0;class board{    protected $power = 1;    protected $top = 'admin';    public function process($lev){        if($lev <= $this->power)            echo '版主删帖';        else{            $top = new $this->top;            $top->process($lev);        }    }}class admin{    protected $power = 2;    protected $top = 'police';    public function process($lev){        if($lev <= $this->power)            echo '管理员删帖';        else{            $top = new $this->top;            $top->process($lev);        }    }}//最高级别class police{    protected $power = 3;    protected $top = null;    public function process($lev){        echo '公安删帖';    }}$judge = new board();$judge->process($lev);