mysql_field_seek(data,field_offset)

<?php
$con = mysql_connect("localhost", "peter", "abc123");
if (!$con) { die('Could not connect: ' . mysql_error()); }

$db_selected = mysql_select_db("test_db",$con);

$sql = "SELECT * from Person";
$result = mysql_query($sql,$con);

// Jump to the fourth field
mysql_field_seek($result,3);
print_r(mysql_fetch_field($result));

mysql_close($con);
?>

stdClass Object
(
[name] => Age
[table] => Person
[def] =>
[max_length] => 2
[not_null] => 0
[primary_key] => 0
[multiple_key] => 0
[unique_key] => 0
[numeric] => 1
[blob] => 0
[type] => int
[unsigned] => 0
[zerofill] => 0
)