php-数据库连接类

<?php
class DB{
    var $host;
    var $user;
    var $pwd;
    var $dbname;
    var $conn;

    function DB($host,$user,$pwd,$dbname){
        $this->host = $host;
        $this->user = $user;
        $this->pwd = $pwd;
        $this->dbname = $dbname;
    }

    function GetConn(){
        $this->conn = mysql_connect($this->host,$this->user,$this->pwd,$this->dbname) or die("数据库服务器连接失败".mysql_errno());
        mysql_select_db($this->dbname,$this->conn) or die("数据库选择失败".mysql_errno());
        mysql_query("SET NAMES 'UTF8'");
        mysql_query("SET CHARACTER SET UTF8");
        mysql_query("SET CHARACTER_SET_RESULTS=UTF8'");
        return $this->conn;
    }
    
    function CloseConnld(){
        mysql_close($this->conn);
    }
}
?>

<?php
class AdminDB{
    function ExecSQL($sql,$conn){
        $sqltype = strtolower(substr(trim($sql), 0, 6));
        $rs = mysql_query($sql);
        if($sqltype == "select"){
            $array = array();
            while($row = mysql_fetch_array($rs)){
                array_push($array,$row);
            }
            if($rs == false)
                return false;
            else
                return $array; 
        }else if($sqltype == "update" || $sqltype == "delete" || $sqltype == "insert"){
            if($rs)
                return true;
            else
                return false;
        }
    }
}
?>