PHP encapsulated connection Mysql class and usage analysis

The example in this article describes the connection Mysql class and usage encapsulated by PHP. Share it with everyone for your reference, the details are as follows:

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");

I hope this article will be helpful to everyone in php programming design.

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