Description:
------------
mysqli_fetch_field return an object like this (printed with print_r):
stdClass Object
(
    [name] => username
    [orgname] => username
    [table] => utenti
    [orgtable] => utenti
    [def] => 
    [max_length] => 0
    [flags] => 16392
    [type] => 253
    [decimals] => 0
)
the property [max_length] should contain the lenght of the field.

Often empty query (select * from utenti where id = -1) are used to retrieve the description of the query when u want to  automatically generate a form to insert a record, so I think it's important that this function work also with this kind of query.

My workaround for now is to open 2 recordset one selecting the first row of the table (SELECT ... WHERE 1 LIMIT 0,1) and the other with the right where clause.

BTW in php 4.3.x and obviously with the mysql extension not mysqli it work well.


Reproduce code:
---------------
<?php

// modified mysqli_fetch_field manual example

$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query = "SELECT Name, SurfaceArea from Country
where  code = 'ZZZ'
ORDER BY Code LIMIT 5";

if ($result = mysqli_query($link, $query)) {

    /* Get field information for all fields */
    while ($finfo = mysqli_fetch_field($result)) {

        printf("Name:     %s\n", $finfo->name);
        printf("Table:    %s\n", $finfo->table);
        printf("max. Len: %d\n", $finfo->max_length);
        printf("Flags:    %d\n", $finfo->flags);
        printf("Type:     %d\n\n", $finfo->type);
    }
    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>