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。