表字段复制有关问题

$link = mysql_connect("localhost", "root", "pwd") or die("Could not connect: " . mysql_error());

mysql_select_db("dbName", $link);

$result = mysql_query("show fields from tableName") or die("Could not query:" . mysql_error());

while($re = mysql_fetch_array($result)){
   echo $re[0];
   echo '
';
}

mysql_close($link);