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$conn = new COM("ADODB.Connection") or die ("ADO Connection faild."); 
$connstr = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=".realpath("app.mdb"); 
$conn->Open($connstr); 

function proshow($condition1,$condition2)
{
if ($condition1=="" || $condition2="")
 {
 $condition="";
 }
 else
 {
 $condition=" where".$condition1."=".$condition2." ";
 }
$rr = new COM("ADODB.RecordSet"); 
$rr->Open("select * from PE_Product '$condition' order by ProductID desc",$conn);
while(!$rr->EOF)
  {
  $p_name=$rr->Fields("ProductName");
  $p_price=$rr->Fields("Price");
  echo "<div>Ãû×Ö£º".$p_name->value."</div>";
  echo "<div>ÁãÊÛ¼Û:".$p_price->value."</div>";
  $rr->Movenext();
  }
 }

proshow("","");
$rr->close();

//////////////////
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Fatal error: Uncaught exception 'com_exception' with message '<b>Source:</b> ADODB.Recordset<br/><b>Description:</b> ²ÎÊýÀàÐͲ»ÕýÈ·£¬»ò²»ÔÚ¿ÉÒÔ½ÓÊܵķ¶Î§Ö®ÄÚ£¬»