Du hast doch:
echo $sql_query;
Warning: mysql_num_fields(): supplied argument is not a valid MySQL result resource in excel_test.php on line 30
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in excel_test.php on line 47
die Fehler-Zeilen sind:
29: $result = mysql_query($sql_query);
30: $fields_cnt = mysql_num_fields($result);
47: while ($row = mysql_fetch_array($result)){ ... }
genügt dir das?
Danke übrigens für deine Mühe!!!