Instances of linked database wrapper classes

一个新手
Release: 2023-03-16 18:28:01
Original
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<?php
class DBDA
{
    public $host="localhost";
    public $uid="root";
    public $pwd="root";
    public $dbname="db_0808";
    /**
     *给一个sql语句,返回执行的结果
     *@param string $sql 用户指定的sql语句
     *@param int $type 用户给的语句类型,0代表增删改,1代表查询
     *@return  返回查询的结果,如果是查询返回二维数组,如果是增删改返回true或false
     */
    function Query($sql,$type=1)
    {
        //造连接对象
        $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
        //执行sql语句
        $reslut = $db->query($sql);
       if(!$reslut){
           die($db->error);
            }
//从结果集对象里面取数据
        if($type==1)
        {
            return $reslut->fetch_all();
        }
        else
        {
            return $reslut;
        }
    }
    /**
     *给一个sql语句,返回关联的二维数组
     *@param string $sql 用户指定的sql语句
     *@param int $type 用户给的语句类型,0代表增删改,1代表查询
     *@return  返回查询的结果,如果是查询返回二维数组,如果是增删改返回true或false
     */
    function GuanQuery($sql,$type=1)
    {
        //造连接对象
        $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
        //执行sql语句
        $reslut = $db->query($sql);
        //取数据
        if($type==1)
        {
            $attr = array();
            while($a = $reslut->fetch_assoc())
            {
                $attr[] = $a;
            }
            return $attr;
        }
        else
        {
            return $reslut;
        }
    }
    /**
     *给一个sql语句,返回字符串
     *@param string $sql 用户指定的sql语句
     *@param int $type 用户给的语句类型,0代表增删改,1代表查询
     *@return  返回查询的结果,如果是查询返回字符串,如果是增删改返回true或false
     */
    function StrQuery($sql,$type=1)
    {
        //造连接对象
        $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
        //执行sql语句
        $reslut = $db->query($sql);
        //取数据
        if($type==1)
        {
            $attr = $reslut->fetch_all();
            $str="";
            foreach($attr as $v)
            {
                $str .= implode("^",$v);
                $str .="|";
            }
            return substr($str,0,strlen($str)-1);
        }
        else
        {
            return $reslut;
        }
    }
}
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