send checkbox value in php

Does anyone knows how to code in php for everytime i tick the checkbox in my form? and when i tick the checkbox,the value is suppose to actually inserted into an id column in my database and it will auto increase every time i tick and submit the form.

This is my code. <form action="create.php" method="post" class="create1"> <br/><input type="checkbox" name="tickExam[]" value="box" /> <input type="submit" name="submit" value="create" />