Untitled

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Ne petku ne, ja jsem v tom nevinne :(</title>
    </head>
    <body>
        <?php
        require_once 'trida.php';
        $trida = new trida($nazev, $typ, $pocetZaku);
        $skoly = $trida->selectAll();
        foreach ($skoly as $skola) {
            echo "<p>Nazev skoly: " . $skola['nazev'] . "<a href='detail.php?id=" . $skola['id'] . "'>Detail</a> <a href=upraveni.php?id=" . $skola['id'] . ">Upraveni</a></p>";
        }
        ?>
    </body>
</html>

---------------- TŘÍDA

<?php

class trida {

    public $nazev;
    public $typ;
    public $pocetZaku;

    function __construct($nazev, $typ, $pocetZaku) {
        $this->nazev = $nazev;
        $this->typ = $typ;
        $this->pocetZaku = $pocetZaku;
    }

    function selectAll() {
        $ukazVse = $this->connect()->prepare("SELECT * FROM `skola`");
        $ukazVse->execute();
        return $ukazVse->fetchAll(PDO::FETCH_ASSOC);
    }

    function selectOne($id) {
        $ukazJeden = $this->connect()->prepare("SELECT * FROM `skola` WHERE `id`=" . $_GET['id'] . "");
        $ukazJeden->execute();
        return $ukazJeden->fetchAll(PDO::FETCH_ASSOC);
    }

    function uprava($id) {
        $vloz = $this->connect()->prepare("UPDATE `skola` SET `nazev` = ?, `typ` = ?, `pocetZaku` = ? WHERE `id`= " . $_GET['id'] . "");
        $vloz->bindParam(1, $this->nazev);
        $vloz->bindParam(2, $this->typ);
        $vloz->bindParam(3, $this->pocetZaku);
        $vloz->execute();
    }

    function connect() {
        $dsn = "mysql:dbname=skola;host=localhost";
        $user = "root";
        $password = "";

        $conn = new PDO($dsn, $user, $password);
        return $conn;
    }

}

----------------- ÚPRAVA

<html>
    <head>
        <meta charset="UTF-8">
        <title>Ne petku ne, ja jsem v tom nevinne :(</title>
    </head>
    <body>
        <form method="post">
            <input type="text" name="nazev" placeholder="nazev"><p>
                <input type="radio" name="typ" id="z" value="z">Zakladni skola
                <input type="radio" name="typ" id="s" value="s">Stredni skola
            <input type="radio" name="typ" id="v" value="v">Vysoka skola<p>
            <input type="number" name="pocetZaku" placeholder="pocet zaku"><p>
                <input type="submit" name="submit">
        </form>

        <?php
        require_once 'trida.php';
        if (isset($_POST['submit'])) {
            $id = $_GET['id'];

            $nazev = $_POST['nazev'];
            $typ = $_POST['typ'];
            $pocetZaku = $_POST['pocetZaku'];

            $trida = new trida($nazev, $typ, $pocetZaku);
            $trida->uprava($id);
        }
        ?>
    </body>
</html>