<?php

class Human
{
    public $Name;
    public $Surname;
    public $Age;
    public $ID;


}?>
<?php
include 'functions.php';
include 'database.php';

if(isset($_GET['del']))
{
    $id = $_GET['del'];
    $query = "DELETE FROM `students` WHERE `students`.`id` = $id";
    mysqli_query($link, $query) or die (mysqli_error($link));
}
$matrix = get_students($link);


?>

    <form action="" method="post" >

<?php  $Data = new Human;
    foreach ($matrix as $UserParams):
        $Data->ID = $UserParams["id"]?>
    <?=$Data->ID ?> <?=$UserParams["first_name"]?> <?=$UserParams["middle_name"]?> <?=$UserParams["last_name"]?>
        <input type="checkbox" name="deleter[]" value="<?=$UserParams["id"]?>" >
    <td> <a href="index.php?del=<?=$UserParams["id"]?>">delete</a></td>
    <Br>
<?php ;
    endforeach; ?>
        <input type="submit" name="formSubmit" value="Submit" >
    </form>

<?php
if( !empty($_POST['deleter']))
{
    $id = $_POST['deleter'];
    $N = count($id);
}
else $N = 0;
echo("Вы выбрали $N : ");
for($i=0; $i < $N; $i++)
{
    echo($id[$i] . " ");
}
/*?del=<?=$UserParams['id']?>"*/
?>