I’m struggling figuring this one out. For years this code worked without any issue. I have Purchase order database that our office uses to create PO’s. When the office staff want to export the entire list. They use a webform and click the date variables, and then push submit. It pops out an excel file. That was the case for years until a few weeks ago when something stopped it from working:
According to the PHPlog this is the error:

Line 28 : mysqli_fetch_fields() expects exactly 1 argument, 2 given

   
    $filename = "Exportfullpo" . date('Y-m-d');
                            
    $qReport = "    SELECT ID AS PurchaseOrder, date AS Date, time AS Time, employee AS Employee, vendor AS Vendor, jobsite AS Customer, description AS Description, price - (price * 0.047619) AS SUB, price * 0.047619 AS GST, price AS Price FROM purchase WHERE date >='$startdate' AND date <='$enddate' ";
    
$header = "";
$data = ""; 

$export = mysqli_query ($link, $qReport ) or die ( "Sql error : " . mysqli_error( ) );

$fields = mysqli_num_fields ( $export );

for ( $i = 0; $i < $fields; $i++ )
{
    $header .= mysqli_fetch_fields( $export , $i ) . "t";
}

while( $row = mysqli_fetch_row( $export ) )
{
    $line = '';
    foreach( $row as $value )
    {                                            
        if ( ( !isset( $value ) ) || ( $value == "" ) )
        {
            $value = "t";
        }
        else
        {
            $value = str_replace( '"' , '""' , $value );
            $value = '"' . $value . '"' . "t";
        }
        $line .= $value;
    }
    $data .= trim( $line ) . "n";
}
$data = str_replace( "r" , "" , $data );

if ( $data == "" )
{
    $data = "n(0) Records Found!n";                        
}

header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=$filename.xls");
header("Pragma: no-cache");
header("Expires: 0");
print "$headern$data";

This issue also persists now on another form we use. So I’m thinking something in the server has changed to create this error?