PHP论坛实现积分系统的思路代码详解

CREATE TABLE `bbs`.`user`(
 `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT comment '用户id',
 `avatar` VARCHAR(255) NOT NULL comment '头像',
 `nickname` VARCHAR(60) NOT NULL comment '昵称',
 `username` VARCHAR(16) NOT NULL comment '用户名',
 `password` CHAR(32) NOT NULL comment '密码',
 `points` INT(10) NOT NULL DEFAULT '0' comment '积分',
 PRIMARY KEY(`id`)
) ENGINE = MYISAM;

CREATE TABLE `bbs`.`level`(
 `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT comment '等级id',
 `name` VARCHAR(60) NOT NULL comment '等级名',
 `max_points` INT(10) UNSIGNED NOT NULL comment '积分上限',
 `min_points` INT(10) UNSIGNED NOT NULL comment '积分下限',
 PRIMARY KEY(`id`)
) ENGINE = MYISAM;

<?php
public function delPic(){
  //获取用户id
  $uid = input('uid');
  if(!$uid){
    $this->error('uid未获取');
  }
  //获取url
  $img = M('member')->where('uid',$uid);
  $url = $img->avatar; //$url = 'http://www.test.com/up/avatar/59b25bcfcaac6.jpg'
  if(!$url){
    $this->error('获取头像失败');
  }
  //获取url有效字段（去掉网址）
  $str = parse_url($url)['path'].parse_url($url)['query'];//$str = '/up/avatar/59b25bcfcaac6.jpg'
  //file文件路径
  $filename = '.'.$str;
  //删除
  if(file_exists($filename)){    
    unlink($filename);
    $info = '原头像删除成功';
  }else{
    $info = '未找到原头像'.$filename;
  }
  echo $info;
}