ช่วยหน่อยครับผมaddข้อมูลลงฐานข้อมูลมากว่า500เรดคอร์ดแล้วมันขึ้นว่า upload error

 if ( $_FILES['file']['error'] ) { 
        die("upload error "); 
    } 
  
 //======Connect DB======================//   
    $m_host = "localhost"; 
    $m_user = ""; 
    $m_pass = ""; 
    $m_name = ""; 

    mysql_connect($m_host,$m_user,$m_pass);  
    mysql_select_db($m_name); 
    mysql_query("SET NAMES UTF8"); 
 //======End Connect DB======================//   

 //======Get data from Excel======================//        
    $dom    =    DOMDocument::load( $_FILES['file']['tmp_name'] ); 
    $rows    =    $dom->getElementsByTagName( 'Row' ); 
    $row    =    0; 
     
    foreach ($rows as $temp) { 
        $col = 0; 
        if($row==0) { 
            $row++; continue; 
        } 
        $cells    = $temp->getElementsByTagName('Cell'); 
		
        foreach( $cells as $cell )  { 
             if($col==0) $data1 = $cell->nodeValue; 
             if($col==1) $data2 = $cell->nodeValue; 
             if($col==2) $data3 = $cell->nodeValue; 
             if($col==3) $data4 = $cell->nodeValue; 
//             if($col==4) $data5 = $cell->nodeValue; 
             $col++; 
        } 
 //======End Get data from Excel======================//        

//==================Insert To DB ====================================//
	$sql = " INSERT INTO play_check (";	
	$sql .= "id_barcode,";									 
	$sql .= "code_name,";
	$sql .= "name_sell,";
	$sql .= "detail";		
			
	$sql .= " ) VALUES ( ";		
	$sql .= " '$data1',";		
	$sql .= " '$data2',";		
	$sql .= " '$data3',";
	$sql .= " '$data4'";
	$sql .= " ) ";		
	mysql_query($sql) or die(mysql_error()); 
//==================End Insert To DB ====================================//
 $row++;  
  } 

mysql_close();