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：
classmysql{
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
privatefunctiondb_connect(){
$this->conn=mysql_connect($this->db_host,$this->db_user,$this->db_pwd)ordie("CouldnotConnectMySqlServer");
}
privatefunctionselectdb(){
mysql_select_db($this->db_name)ordie("unabletoselectdbname")
}
privatefunctionquery(){
return$this->result=mysql_query($this->querysql);
}
privatefunctionget_result($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
privatefunctionget_num(){
return$this->num=mysql_num_rows($this->result);
}
}
$m=newmysql("testuser","localhost","root","root");
$arreresult=$m->get_result("select*fromuserinfo");
希望本文所述对大家php程序设计有所帮助。