Description:
------------
Script freez on read output via fgets

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

ini_set("expect.loguser", "Off");
$stream = fopen("expect://telnet 10.244.0.164", 'r');

$cases = array (
    array (0 => "username:", 1 => USERNAME),
    array (0 => "password:", 1 => PASSWORD),
    array (0 => "#", 1 => PROMPT)
);

while (true) {
    switch (expect_expectl ($stream, $cases)) {
        case PASSWORD:
            fwrite ($stream, "password\r");
            break;
        case USERNAME:
            fwrite ($stream, "admin\r");
            break;
        case PROMPT:
            break 2;
        default:
            die ("Error was occurred while connecting to the remote host!\n");
    }
}

while ($line = fgets($stream)) {
      print $line;
}
fclose ($stream);

?>

Expected result:
----------------
DES-3526 Fast Ethernet Switch Command Line Interface

                            Firmware: Build 5.00-B27
          Copyright(C) 2000-2004 D-Link Corporation. All rights reserved.
username:admin
password:********

DES-3526:admin#

This code do it:

<?php

$stream = fopen("expect://telnet 10.244.0.164", 'r');

$cases = array (
    array (0 => "username:", 1 => USERNAME),
    array (0 => "password:", 1 => PASSWORD),
    array (0 => "#", 1 => PROMPT)
);

while (true) {
    switch (expect_expectl ($stream, $cases)) {
        case PASSWORD:
            fwrite ($stream, "password\r");
            break;
        case USERNAME:
            fwrite ($stream, "admin\r");
            break;
        case PROMPT:
            break 2;
        default:
            die ("Error was occurred while connecting to the remote host!\n");
    }
}

?>

Actual result:
--------------
Freezing without any output