php Á¬½ÓÊý¾Ý¿âµÄÀà

<?php
class Access//AccessÊý¾Ý¿â²Ù×÷Àà
{
var $databasepath,$constr,$dbusername,$dbpassword,$link;//ÀàµÄÊôÐÔ
function Access($databasepath,$dbusername,$dbpassword)//¹¹Ô캯Êý
{
$this->databasepath=$databasepath;
$this->username=$dbusername;
$this->password=$dbpassword;
$this->connect();
}

function connect()//Êý¾Ý¿âÁ¬½Óº¯Êý
{
$this->constr="DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" . realpath($this->databasepath);
$this->link=odbc_connect($this->constr,$this->username,$this->password,SQL_CUR_USE_ODBC);
return $this->link;
//if($this->link) echo "¹§Ï²Äã,Êý¾Ý¿âÁ¬½Ó³É¹¦!";
//else echo "Êý¾Ý¿âÁ¬½Óʧ°Ü!";
}

function query($sql)//ËÍÒ»¸ö²éѯ×Ö·û´®µ½Êý¾Ý¿âÖÐ
{
return @odbc_exec($this->link,$sql);
}

function first_array($sql)//´ÓaccessÊý¾Ý¿âÖзµ»ØÒ»¸öÊý×é
{
return @odbc_fetch_array($this->query($sql));
}

function fetch_row($query)//·µ»Ø¼Ç¼ÖеÄÒ»ÐÐ
{
return odbc_fetch_row($query);
}

function total_num($sql)//È¡µÃ¼Ç¼×ÜÊý
{
return odbc_num_rows($this->query($sql));
}

function close()//¹Ø±ÕÊý¾Ý¿âÁ¬½Óº¯Êý
{
odbc_close($this->link);
}

function insert($table,$field)//²åÈë¼Ç¼º¯Êý
{
$temp=explode(',',$field);
$ins='';
for ($i=0;$i<count($temp);$i++)
{
$ins.="'".$_POST[$temp[$i]]."',";
}
$ins=substr($ins,0,-1);
$sql="INSERT INTO ".$table." (".$field.") VALUES (".$in