crazy

<?php
session_start();
// да речем, че не виждам изобщо този код
/*$user = secure($_SESSION['user']);
$fu = mysql_query("SELECT * FROM user WHERE userid='{$user}'");
$u = mysql_fetch_assoc($fu);
*/

$users = [
            [
                'id' => 1,
                'username' => 'user1'
            ],
            [
                'id' => 2,
                'username' => 'user2'
            ],
            [
                'id' => 3,
                'username' => 'user3'
            ],
            [
                'id' => 4,
                'username' => 'user4'
            ],
            [
                'id' => 5,
                'username' => 'user5'
            ],
            [
                'id' => 6,
                'username' => 'user6'
            ],
            [
                'id' => 7,
                'username' => 'user7'
            ],
            [
                'id' => 8,
                'username' => 'user8'
            ],
            [
                'id' => 9,
                'username' => 'user9'
            ],
            [
                'id' => 10,
                'username' => 'user10'
            ],
            [
                'id' => 11,
                'username' => 'user11'
            ],
            [
                'id' => 12,
                'username' => 'user12'
            ],
        ];

$current_id = 4;
$isDataAvailable = false;
$i = 0;

if ( isset($_POST['user']) ) {
    print_r($_POST);
    $isDataAvailable = true;

    while ( sizeof($_SESSION['temp']) > $i ) {
        $id = $_SESSION['temp'][$i];
        ?>
        <form method="POST">
            <input type="submit" name="user" value="<?php echo $users[$id]['id']; ?>" />
        </form>
        <?php
        $i++;
    }
    exit;
}

if ( !$isDataAvailable )
    $_SESSION['temp'] = [];

while ( sizeof($_SESSION['temp']) < 5 )
{
    $rand = array_rand($users);
    if ( $current_id != $users[$rand]['id'] && !in_array($rand, $_SESSION['temp']) ) {
        $_SESSION['temp'][] = $rand;
        ?>
        <form method="POST">
            <input type="submit" name="user" value="<?php echo $users[$rand]['id']; ?>" />
        </form>
        <?php
    }
    #$fe = mysql_query("SELECT * FROM user WHERE id!='{$u['id']}' ORDER BY RAND()");
    #$e = mysql_fetch_assoc($fe);
}