重新设置Cookie需要使之前的Cookie失效，删除Cookie也是同样的方法：
setcookie(‘RecordLuHuiDUDU',”,time()-3600*24*30);
【代码示例】
/** * 将用品id存入Cookie中 * * @param $id * @return bool */ public function setCookieRecord($id){ $data = null; if(!isset($_COOKIE['RecordLuHuiDUDU'])){ if(!empty($id)) { $data[0] = array( 'id' = $id, 'time' = date('Y-m-d H:i:s', time()) ); }else{ return false; } }else{ if(!empty($id)) { $data = $_COOKIE['RecordLuHuiDUDU']; setcookie('RecordLuHuiDUDU','',time()-3600*24*30); $data = json_decode($data, true); $num = count($data); //判断是否重复 $judge = false; foreach($data as $index => $value){ if($data[$index]['id'] == $id){ $data[$index]['time'] = date('Y-m-d H:i:s', time()); $judge = true; } } if($judge){ setcookie('RecordLuHuiDUDU',json_encode($data),time()+3600*24*30); return true; } if($num == 10){ for($i = 0; $i < 9; $i++){ $data[$i] = $data[$i+1]; } $data[9] = array( 'id' => $id, 'time' => date('Y-m-d H:i:s', time()) ); } if($num <10){ $data[$num] = array( 'id' => $id, 'time' => date('Y-m-d H:i:s', time()) ); }else { return false; } } } setcookie('RecordLuHuiDUDU',json_encode($data),time()+3600*24*30); return true; }