在PHP中嵌套循环和语句

Question

I have this code and I want to add checkbox according to fetched number from database with PHP and when clicked on checkbox update a field in db with JQuery, this work for 1 checkbox but this cant work for more checkbox and Also my PHP loop does not work how i can add checkbox with loops and when user click on any checkbox update His own field on database, anybody can resolve my problem ?

My JQuery code:

$(document).ready(function () {
    $('#mycheckbox').change(function () {
        var returnVal = ("Are " + "you sure?");
        if (returnVal) {
            postToServer($(this).prop("checked"));

        } else {
            $(this).prop("checked", !$(this).is(":checked"));
        }
    });
    function postToServer(state) {
        let value = (state) ? 1 : 0;

        $.ajax({
            type: 'POST',
            url: 'checkbox.php',
            data: {'value': +value},
            success: function (response) {
                //handle response
            }
        });
    }
}

and my PHP code:

$sql1="SELECT * FROM `users` ";
$result1= mysqli_query($conn,$sql1);
$row1=mysqli_fetch_assoc($result1);
$lights=$row1["lights"];
for ($i=0; $i < $lights; $i++){
    if ($row["value"]=='1'){
        echo "<input type=\"checkbox\" class=\"checkbox\" id=\"mycheckbox\" checked=\"checked\">";
    } else {
        echo "<input type=\"checkbox\" class=\"checkbox\" id=\"mycheckbox\" >";
    }
}

Answer 1

This should fix the issue with your loop not running and should print out the checkbox for each user

$users= mysqli_query($conn, "SELECT * FROM user");
while($row = mysqli_fetch_assoc($users)) {
    if ($row["value"]=='1'){
       echo '<input type="checkbox" class="checkbox" id="mycheckbox-'.$row["id"].'" checked="checked">';
    }else {
        echo '<input type="checkbox" class="checkbox" id="mycheckbox-'.$row["id"].'" >';
    }
}

Added the id of the user to each checkbox id in order to make each one have a unique id