PHP封装的mysqli数据库操作类示例
发布:smiling 来源: PHP粉丝网 添加日期:2021-11-09 15:33:10 浏览: 评论:0
这篇文章主要介绍了PHP封装的mysqli数据库操作类,涉及php针对mysqli数据库的连接、增删改查、分页、排序等相关操作技巧,需要的朋友可以参考下。
本文实例讲述了PHP封装的mysqli数据库操作类,分享给大家供大家参考,具体如下:
由于PHPMySQL操作在PHP5.4以下被弃用而推荐使用mysqli(MySQL Improvement),这里是在我原有的MySQL数据库操作类的基础上加以改进而编写出的MySQLI数据库操作类,整体代码与MySQL数据库操作类大致相同,直接实例化db_class即可。
- <?php
- class db_class{
- public $db_url; //连接地址
- public $db_username; //连接名
- public $db_userpassword; //连接密码
- public $db_name; //数据库名
- public $db_tablename; //表名
- public $db_conn; //数据库连接
- public $db_order;
- public $db_limit;
- public function db_getconn(){ //连接数据库
- $this->db_conn= mysqli_connect($this->db_url,$this->db_username,$this->db_userpassword,$this->db_name);
- if (!$this->db_conn)
- {
- echo "连接 MySQL 失败: " . mysqli_connect_error();
- }
- }
- public function __construct($db_url,$db_username,$db_userpassword,$db_name){ //构造方法赋值
- $this->db_url=$db_url;
- $this->db_username=$db_username;
- $this->db_userpassword=$db_userpassword;
- $this->db_name=$db_name;
- $this->db_order="";
- $this->db_limit="";
- $this->db_getconn();
- mysqli_query($this->db_conn,'set names utf8');
- }
- public function db_settablename($db_tablename){ //设置表名
- $this->db_tablename=$db_tablename;
- }
- public function db_setorder($str){ //排序操作
- $this->db_order="order by $str";
- }
- public function db_setlimit($start,$end){ //分页操作
- $this->db_limit="limit $start,$end";
- }
- public function db_select($typearr="",$where=""){ //查询操作
- if(emptyempty($typearr)){
- $typearr="*";
- }
- else{
- $typearr=implode(",",$typearr);
- }
- if(emptyempty($where)){
- $where="";
- }else{
- $where="where ".$where;
- }
- $arr=array();
- $sql="select $typearr from $this->db_tablename $where $this->db_order $this->db_limit ";
- $result = mysqli_query($this->db_conn,$sql);
- while($row = $result->fetch_array()) {
- $arr[]=$row;
- }
- return $arr;
- }
- public function db_update($typearr,$valuearr,$where=""){ //更新操作
- $sql="";
- if(emptyempty($where)){
- $where="";
- }else{
- $where=" where ".$where;
- }
- $sql.="update $this->db_tablename set ";
- foreach ($typearr as $key=>$value){
- if(count($typearr)-1==$key){
- $sql.=$value."='".$valuearr[$key]."'";
- }else{
- $sql.=$value."='".$valuearr[$key]."'".",";
- }
- }
- $sql.=$where;
- mysqli_query($this->db_conn,$sql);
- }
- public function db_delete($typestr,$valuestr){ //删除操作
- $sql="delete from $this->db_tablename WHERE $typestr=$valuestr";
- mysqli_query($this->db_conn,$sql);
- }
- public function db_insert($typearr,$valuearr){ //插入操作
- $sql="insert into $this->db_tablename(".implode(",", $typearr).") values(".implode(",", $valuearr).")";
- mysqli_query($this->db_conn,$sql);
- }
- public function __destruct(){ //析构方法关闭连接
- mysqli_close($this->db_conn);
- }
- }
Tags: PHP封装mysqli
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