Description:
------------
Floats submitted over prepared statement parameters are all set to the same (last?) value.

Test script:
---------------
On SQL server create table for tests:

CREATE TABLE float_test(
F1 float not null,
F2 float not null,
F3 float not null
);

Create ODBC connection FLOAT_TEST using available driver for SQL server;

Then execute:

$o = odbc_connect('FLOAT_TEST', 'user', 'pass');
$st_txt = 'INSERT INTO float_test (f1, f2, f3) values (?, ?, ?)';
odbc_exec($o, 'DELETE FROM float_test');
$st = odbc_prepare($o, $st_txt);
odbc_execute($st, array(1.0, 2.0, 3.0));
$st2 = odbc_prepare($o, 'SELECT f1, f2, f3 from float_test');
odbc_execute($st2);
echo json_encode(odbc_fetch_object($st2));

Expected result:
----------------
{"f1":"1.0","f2":"2.0","f3":"3.0"}

Actual result:
--------------
{"f1":"3.0","f2":"3.0","f3":"3.0"}