~~~ <?php /** * 根據不文明程度處理帖子 * 1. 版主刪帖 * 2. 管理員封號 * 3. 治安部門管理 */ interface Duty{ function process(); } class Board implements Duty{ //級別1 protected $level = 1; //上級 protected $top = "Admin"; function process($lv = 1){ if ($lv <= $this->level){ echo "版主刪帖".'<br>'; }else{ $topClass = new $this->top; $topClass->process($lv); } } } class Admin implements Duty{ //級別1 protected $level = 2; //上級 protected $top = "Police"; function process($lv = 2){ if ($lv <= $this->level){ echo "管理員凍結賬號".'<br>'; }else{ $topClass = new $this->top; $topClass->process($lv); } } } class Police implements Duty{ function process($lv = 3){ echo "治安部門處理".'<br>'; } } //測試 $board = new Board(); $board->process(3); ~~~