Michani cisel a jejich hadani

<?php
$pole = array(1,2,3,4,5,6,7,8,9,0);
$form = "<form method='POST' action='shuffle.php'>\n";

if(isset($_POST["shuffle"]))
{
    $form = $form."<input type='hidden' name='shuffled' value='shuffled' />\n";
}else if(!isset($_POST["list"])){
    $form = $form."<input type='text' name='userInput' value='' />\n";
    $form = $form."<input type='submit' name='shuffle' value='Start!' />\n";
}

if(!isset($_POST["showed"])||isset($_POST["new"]))
{
    shuffle($pole);
    echo "<table border='1'>\n";
    for($i=0; $i<count($pole); $i++)
    {
        echo "<tr><td>".($i+1)."</td><td>".$pole[$i]."</td></tr>\n";
    }
    echo "</table>\n";
    $numz = "";
    for($i=0; $i<count($pole); $i++)
    {
        $numz = $numz.$pole[$i].",";
    }
    $form = $form."<input type='hidden' name='list' value='$numz' />\n";
    $form = $form."<input type='hidden' name='showed' value='showed' />\n";
}else{
    $oldInputs = array();
    if(isset($_POST["userInput"])&&!isset($_POST["userInputs"]))
        $oldInputs[0] = $_POST["userInput"];
    else if(isset($_POST["userInputs"]))
        $oldInputs = explode(",", $_POST["userInputs"]);
    else
        echo "Error!<br />";
    echo "oldInputs<br />\n";
    print_r($oldInputs);
    $form = $form."<input type='hidden' name='showed' value='showed' />\n";
}

if(isset($_POST["list"]))
{
    $listValue = $_POST["list"];
    $form = $form."<input type='hidden' name='list' value='$listValue' />\n";
    $form = $form."<input type='text' name='userInput' value='' />\n";
}
if(isset($_POST["userInput"]))
{
    $userInput = $_POST["userInput"];
    $oldInputs = "";
    if(isset($_POST["userInputs"]))
        $oldInputs = $_POST["userInputs"].$userInput.",";
    else
        $oldInputs = $userInput.",";
    $form = $form."<input type='hidden' name='userInputs' value='$oldInputs' />\n";
}

if(isset($_POST["shuffle"])||isset($_POST["list"]))
    $form = $form."<input type='submit' value='Odeslat' />\n";

if(isset($_POST["counter"])){
    $counter = $_POST["counter"];
    $form = $form."<input type='hidden' name='counter' value='".($counter+1)."' />\n";
}else
    $form = $form."<input type='hidden' name='counter' value='0' />\n";

if(isset($_POST["counter"]))
{
    echo "<table border='1'>";
    $counter = (int)$_POST["counter"];
    if(isset($_POST["list"]))
        $list = explode(",", $_POST["list"]);
    echo "counter = $counter<br />\n";
    if(isset($_POST["userInputs"]))
        $oldInputs = explode(",", $_POST["userInputs"]);
    for($i=0; $i<$counter; $i++)
    {
        if($list[$i]==$oldInputs[$i])
            echo "<tr><td>".($i+1)."</td><td bgcolor='green'>".$oldInputs[$i]."</td></tr>\n";
        else
            echo "<tr><td>".($i+1)."</td><td bgcolor='red'>".$oldInputs[$i]."</td></tr>\n";
    }
}

if(isset($_POST["counter"]))
{
    $counter = (int)$_POST["counter"];
    /*if($counter == 10)
    {
        $pattern = "/<form.+
        preg_replace("<input type='submit' name='shuffle' value='Start!' />\n",
    }*/
}

//$form = $form."<input type='submit' />\n";
$form = $form."</form>\n";
echo $form;
?>