php封装的连接Mysql类及用法分析
这篇文章主要介绍了php封装的连接Mysql类及用法,基于php封装了简单的MySQL数据库的连接、查询、遍历等技巧,并附带说明了其具体用法,需要的朋友可以参考下，本文实例讲述了php封装的连接Mysql类及用法，分享给大家供大家参考，具体如下：
- class mysql{
- private $db_name;
- private $db_host;
- private $db_user;
- private $db_pwd;
- private $conn;
- private $querysql;
- private $result;
- private $resultarray=array();
- private $row;
- //创建构造函数 数据库名 主机名 用户名 密码
- function __counstruct($dbname,$dbhost,$dbuser,$dbpwd){
- $this->db_name=$dbname;
- $this->db_host=$dbhost;
- $this->db_pwd=$dbpwd;
- $this->db_user=$dbuser;
- $this->dbconnect();
- $this->selectdb();
- }
- //连接数据库
- private function db_connect(){
- $this->conn=mysql_connect($this->db_host,$this->db_user,$this->db_pwd) or die("Could not Connect MySql Server");
- }
- private function selectdb(){
- mysql_select_db($this->db_name) or die("unable to select dbname")
- }
- private function query(){
- return $this->result=mysql_query($this->querysql);
- }
- private function get_result($sql){
- $this->querysql=$sql;
- $this->query();
- if($this->get_num()>0){
- //mysql_fetch_assoc()和 mysql_fetch_array(,MYSQL_ASSOC)从结果集中取得一行作为关联数组 没有则返回false
- while($this->rows=mysql_fetch_array($this->result)){
- //赋值 数组赋值 resultarray[]= 将影响的行数赋值给数组
- $this->resultarray[]=$this->rows
- }
- return $this->resultarray;
- }
- }
- //$result返回值为 bool类型 false为没有数据
- private function get_num(){
- return $this->num=mysql_num_rows($this->result);
- }
- }
- $m=new mysql("testuser","localhost","root","root");
- $arreresult=$m->get_result("select * from userinfo");
希望本文所述对大家php程序设计有所帮助。