PHP Script not working after user closes the connection (I am using ignore_user_abort())

I have two files named playermonitor.php and keepplayeralive.php

playermonitor.php is supposed to run an infinite loop with an interval of 1 second and keep checking the value of column status in the table players of a database, if it is equal to 0, then increase $count else set the value of the column to 0. If $count becomes equal to 3, delete the table from the database. It is as follows

<?php
    session_start();
    ignore_user_abort(true);
    set_time_limit(0);
    /*if (true) is used for testing only*/
    if (true) {
        $_SESSION['playermonitorisrunning'] = 1;
        $link = mysqli_connect('host', 'username', 'password', 'database name');
        $playerid = $_SESSION['playerid'];
        $count = 0;
        while (true) {
            $result = mysqli_query($link, "SELECT `status`, `gameid` FROM `players` WHERE `playerid` = ".$playerid.";");
            $player = mysqli_fetch_array($result);
            $playerstatus = $player['status'];
            $gameid = $player['gameid'];
            if ($playerstatus == 0) {
                $count += 1;
                if ($count == 3) {
                    $result = mysqli_query($link, "SELECT * FROM `games` WHERE `gameid` = ".$gameid.";");
                    if (mysqli_num_rows($result)) {
                        $game = mysqli_fetch_array($result);
                        $gameid = $game['gameid'];
                        $playercount = $game['playercount'] - 1;
                        for ($suff = 1; $suff <= $game['playerlimit']; $suff++) {
                            $playerslotname = 'player'.$suff;
                            if ($game[$playerslotname] == $playerid) {
                                break;
                            }
                        }
                        $result = mysqli_query($link, "UPDATE `games` SET `playercount` = ".$playercount.", `".$playerslotname."` = NULL WHERE `gameid` = ".$gameid.";");
                    }
                    $result = mysqli_query($link, "DELETE FROM `players` WHERE `playerid` = ".$playerid.";");
                    break;
                }
            }
            else {
                $result = mysqli_query($link, "UPDATE `players` SET `status` = 0 WHERE `playerid` = ".$playerid.";");
                $count = 0;
            }
            sleep(1);
        }
    }
    die();
?>

And the keepplayeralive.php is supposed to run an infinite loop with an interval of 0.5 seconds, and keep setting the value of the column status of the table players in the database to 1. And it should break the loop when the user closes the connection. It is as follows

<?php
    session_start();
    ignore_user_abort(true);
    set_time_limit(0);
    $link = mysqli_connect('host', 'username', 'password', 'databse name');
    $playerid = $_SESSION['playerid'];
    while (true) {
        $result = mysqli_query($link, "UPDATE `players` SET `status` = 1 WHERE `playerid` = ".$playerid.";");
        if (connection_aborted()) {
            break;
        }
        sleep(0.5);
    }
    die();
?>

I call these scripts asynchronously through JavaScript using XMLHttpRequest like this

var keepplayeronline = new XMLHttpRequest();
keepplayeronline.open("GET", "keepplayeronline.php", true);
keepplayeronline.send();

var playermonitor = new XMLHttpRequest();
playermonitor.open("GET", "playermonitor.php", true);
playermonitor.send();

If this all worked fine, the row in the database with value of column playerid equal to $playerid should get deleted after the user closes the connection.

However, the row doesn't get deleted after I close my connection to the server. What am I doing wrong?