Do pokazania

#####################PHP - CONN_CFG.PHP
<div style="background: lightblue;">
<?php
session_start();
$servername = "localhost";
$username = "root";
$password = "";
$db="mariolka";
$conn = mysqli_connect($servername, $username, $password, $db);
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
else {
echo "Connected successfully";
require_once("sesja.php");
}


$sql2 = "SELECT count(tresc) as licznik from posty";
$count = mysqli_query($conn, $sql2);
if (mysqli_num_rows($count)>0) {
        while($row2 = mysqli_fetch_assoc($count)) {
            echo "<br>";
            $p1=$row2['licznik'];
            echo $p1;
            echo "<br>";
            $p2=$_SESSION["offset"]+1;
            echo $p2;
            if ($p2==$p1) {
                require_once("restart.php");
            }
        }
}
else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

$oFF= $_SESSION["offset"];
$sql = "SELECT * FROM `posty` LIMIT 1 OFFSET $oFF";
$result = mysqli_query($conn, $sql);
if (mysqli_num_rows($result)>0) {
    while($row = mysqli_fetch_assoc($result)) {
        echo "<br>"."ID_test: ".$row["id_posta"];
    }
}
else {
    echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
?>
</div>
#####################PHP - SESJA.PHP
<?php
//session_start();
if (isset($_SESSION["offset"])) {
    $_SESSION["offset"]=$_SESSION["offset"]+1;
}
else {
    $_SESSION["offset"] = 0;
}
?>
#####################PHP - RESTART.PHP
<?php
//session_start();
session_destroy();
?>
#####################INDEX.PHP w którym w sumie nie ma PHP xD
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>

<button>Sram psa jak srand</button>
<div id="div"> </div>
<script>
//var xD;
$("button").click(function(){
    $.get("conn_cfg.php", function(data, status){
        //$.get( "conn_cfg.php", { name: "John", time: "2pm" } );
        document.getElementById("div").innerHTML=data;

    });
});


</script>
</body>
</html>