Question

I want to export data from mysql tables to excel sheet. I am using excel 2007. Once this code was working properly but today I am getting problem. Please guide me where I am doing wrong. I have huge data about 60,000 rows.

<?php
/* 
Export MySQL to Excel using PHP & HTML tables
Author: Vlatko Zdrale, http://blog.zemoon.com

Look but don't touch :)
*/
    include "mysql_connection.php";
    //$dbTable = 'info';            // table name
    $con=open_db_connection();


    $sql = "select info_id, name, category_list.category, company_name, company_address, company_phone, date from info, city_list, category_list where city=cid and info.category=id";
    $result = @mysql_query($sql)    or die("Couldn't execute query:<br>".mysql_error().'<br>'.mysql_errno());

    header('Content-Type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');   //define header info for browser
    header('Content-Disposition:attachment; filename=information-'.date('Ymd').'.xlsx');
    header('Pragma: no-cache');
    header('Expires: 0');

    echo '<table><tr>';
    for ($i = 0; $i < mysql_num_fields($result); $i++)   // show column names as names of MySQL fields
        echo '<th>'.mysql_field_name($result, $i).'</th>';
    print('</tr>');

    while($row = mysql_fetch_row($result))
    {
        //set_time_limit(60); // you can enable this if you have lot of data
        $output = '<tr >';
        for($j=0; $j<mysql_num_fields($result); $j++)
        {
            if(!isset($row[$j]))
                $output .= '<td>&nbsp;</td>';
            else
                $output .= "<td>$row[$j]</td>";
        }
        print(trim($output))."</tr>\t\n";
    }
    echo('</table>');
?>

Its very important please guide me. Thanks in advance.

Answer 1

You will get that message because the file isn’t an OfficeOpenXML xlsx file, but a file containing HTML markup with a .xlsx extension. You’re telling Excel that the file is one format by the extension when it’s really another, and it let’s you know that the content doesn’t match the extension. As long as it can read the HTML markup cleanly, it should still load successfully, but will always issue this message.

The more recent versions of Excel are more fussy about this than earlier versions.

If you want to get rid of the message, then either you rename your .xlsx as a .html file so that the extension matches the content (you’ll need to import into Excel then, or moodify file associations so that html files are opened using Excel); or give it a tab-separated value file with a csv extension (that can be opened by double click), though you can’t add any formatting using this option; or give it a real OfficeOpenXML .xlsx file