Question

I am attempting to add a function that will create a csv for download from a certain table in the db. I have got it partially working but cannot figure out how to exclude certain columns from the rows section of the csv. Here is my code so far,

$host = 'xxx';
$user = 'xxxx';
$pass = 'xxxx';
$db = 'xxxx';
$table = 'headers';
$file = 'export';

$filename = $file."_".date("Y-m-d_H-i",time());
header("Content-type: application/vnd.ms-excel");
header("Content-disposition: csv" . date("Y-m-d") . ".csv");
header( "Content-disposition: filename=".$filename.".csv");

$link = mysql_connect($host, $user, $pass) or die("Can not connect." . mysql_error());
mysql_select_db($db) or die("Can not connect.");

$result = mysql_query("SHOW COLUMNS FROM ".$table." WHERE Field NOT IN ('invhead_id', 'note');");
$i = 0;
if (mysql_num_rows($result) > 0) 
{
   while ($row = mysql_fetch_assoc($result)) 
   {
      $csv_output .= $row['Field'].", ";
      $i++;
   }
}
$csv_output .= "\n";

$values = mysql_query("SELECT * FROM ".$table."");
while ($rowr = mysql_fetch_row($values)) 
{
   for ($j=0;$j<$i;$j++) 
   {
      $csv_output .= $rowr[$j].", ";
   }

   $csv_output .= "\n";
}


print $csv_output;
exit;

I have excluded the columns invhead_id and note from the $result output but also need to exlude them from the $values output as well however this is the bit I cannot get to work. Can anyone point me in the right direction?

Thanks

Answer 1

The easiest way is to select your columns by name instead of select *

There is no easier way, but you could also write a php function that compares your two arrays and discards the ones you don’t want based on the first array and….you should just use my first idea.

SELECT field1, field2, field7 FROM table