Php script when i click on button or image - php

Question

I have this code `Lessons List
$sqlessons = 'SELECT * FROM lessons ';
$lessons = $mysqli->query($sqlessons);
while ($row=$lessons->fetch_assoc())
{
echo "<li>$row[lesson_name] : <span>$row[lesson_description]</span></li>";?>
<form action="script.php" method="get">
<input type="submit" value="Add this lesson now!">
</form>
<?php } ?>
</p>
</ul>`
this code presents a list of lessons with a button below of every lesson.
I want to add to this button a funtion that adds to my database :
$user_id ( i have that loaded in session )
$lesson_id (i have that only inside the 'while')
so if I click the button on Lesson1 (lesson_id =1) and I am the user Nick D (user_id=2) then the script will add a line to my database table usersVSlessons :
10,1,2 (the 10 is a random foreign key of the table).
I think you get what I want to do :P
Any ideas?

Answer 1

Place both user_id & lesson_id in input type hidden, get values onclick submit buttom & then make an ajax call to store data in db.
(you can either generate random no. in javascript or you can also use php to generate random value & input type to hidden place it)