<?php
$result = null;
if(isset($_POST['submit'])) {

   $foods = $_POST['foods'];

   foreach ($foods as $food){
       echo "You like {$food} <br>";
   }
}

?>



<form action="index.php" method="post">
    <input type="checkbox" name="foods[]" value="pizza"> pizza <br>
    <input type="checkbox" name="foods[]" value="hamburger">Hamburger <br>
    <input type="checkbox" name="foods[]" value="hotdog"> hotdog <br>
    <input type="checkbox" name="foods[]" value="taco"> taco <br>

    <input type="submit" value="Submit" name="submit">
</form>