php封装的连接Mysql类及用法分析

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。