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webbsrvprg/exercises/cookie/

cookie.php
cookie1.php
cookie2.php
cookie3.php
cookie3_hemligheter.php
cookie4.php
cookie5.php

`cookie4.php`

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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="UTF-8">

  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <title>Cookies-Session</title>

</head>

<body>

  <?php

  session_start();



  if (isset($_POST["destroy"])) {

    $_SESSION["numbers"] = array();

    session_destroy();

  }



  if (isset($_POST["number"])) {

    $number = $_POST["number"];

    $numbers = array();

    if (isset($_SESSION["numbers"])) {

      $numbers = $_SESSION["numbers"];

    }



    $antal = count($numbers);



    $numbers[$antal] = $number;



    $_SESSION["numbers"] = $numbers;



    $average = 0;



    foreach($numbers as $i) {

      $average += $i / ($antal + 1);

    }



    echo $average;

  }

  ?>



  <form method="post" action="">

    <input name="number" type="number">

    <br>

    <input type="submit" value="Lägg till">

  </form>



  <form method="post" action="">

    <input type="hidden" name="destroy" value="">

    <input type="submit" value="Nollställ">

  </form>

</body>

</html>