int mysql_field_name (int result, int field_index);

<?

$connect = mysql_connect("localhost","id","1234");
$mysql_select_db("DBNAME","$connect");

$sql = "select * from test";
$result = mysql_query($sql, $connect);
$fields = mysql_num_field(4result);

for($i=0; $i<$fields; $i++){
echo mysql_field_name(result, $i). "<br>";
}
mysql_close();

?>