Php sayfalama Sorunu

<?php
include $_SERVER['DOCUMENT_ROOT'] . '/pages/_header.php';
?>
<div class="container">
<div class="games">
<div class="popular-games index">
<h3>Başlık</h3>
<div id="keys-content">
<?php

$sayfada = 5;
$sorgu = mysql_query("select * from packet");
$toplam_icerik = mysql_num_rows($sorgu);
$toplam_sayfa = ceil($toplam_icerik / $sayfada);
$sayfa = isset($_GET['sayfa']) ? (int) $_GET['sayfa'] : 1;
if($sayfa < 1) $sayfa = 1;
if($sayfa > $toplam_sayfa) $sayfa = $toplam_sayfa;
$limit = ($sayfa - 1) * $sayfada;

$querypacketList = $db->query("SELECT distinct(`packet`.`packet_id`),packet_name,packet_images,packet_f1,packet_f2,packet_f3,packet_f4,packet_price FROM packet INNER JOIN product ON product.packet_id = packet.packet_id WHERE packet_status = 1 AND packet_f1 = 'CD-KEY' DESC $limit,$sayfada ");

if($querypacketList->rowCount() > 0){

foreach ($querypacketList as $packetPrint) { ?>
<a href="satinal.php?paketid=<?= $packetPrint['packet_id']?>" class="game">
<div class="game-pic">
<img src="<?=$packetPrint['packet_images']?>" alt="<?=$packetPrint['packet_name']?>">
</div>
<div class="game-title text-center"><?=$packetPrint['packet_name']?></div>
<div class="text-center">
<span class="random-chance"><?=$packetPrint['packet_f2']?><br /></span>
<span class="random-chance">Anında Teslimat<br /></span>
<span class="random-chance">Güvenilir Adres<br /></span>
<span class="random-chance"><br /></span>
</div>
<div class="g-price">
<span class="game-price"><?=$packetPrint['packet_price']?> TL</span>
</div>
<span class="game-cost">SATIN AL</span>
</a>
<?php }
}else{
echo "<div style='padding:10px 15px; background:#F38989; line-height:20px; border-radius:5px; color:white;'>
<div style='display:flex;'>
<img style='height:20px; line-height:20px;' src='https://img.icons8.com/doodle/48/000000/error.png'/>
<b style='height:20px; line-height:20px; padding-left:10px;'>Listelenecek ürün bulanamadı!</b>
</div>
</div>";
} ?>
</div>
<?php
$s=0;
while ($s < $toplam_sayfa) {
$s++; ?>

<a href="cd-key.php?sayfa=<?php echo $s; ?>"><?php echo $s; ?></a>
<?php }
?>
</div>
</div>
</div>
</div>
<?php
include $_SERVER['DOCUMENT_ROOT'] . '/pages/_footer.php';
?>

$sorgu = mysql_query("SELECT COUNT(distinct(`packet`.`packet_id`)) as total FROM packet INNER JOIN product ON product.packet_id = packet.packet_id WHERE packet_status = 1 AND packet_f1 = 'CD-KEY'");
$toplam_icerik = (int)mysql_fetch_assoc($sorgu)['total'];

$sorgu = mysql_query("SELECT COUNT(distinct(`packet`.`packet_id`)) as total FROM packet INNER JOIN product ON product.packet_id = packet.packet_id WHERE packet_status = 1 AND packet_f1 = 'CD-KEY'");
$toplam_icerik = (int)mysql_fetch_assoc($sorgu)['total'];

Fatal error: Uncaught Error: Call to undefined function mysql_query() in /home/deneme/deneme.com/cd-key.php:17 Stack trace: #0 {main} thrown in /home/deneme/deneme.com/cd-key.php on line 17

Warning: mysqli_query() expects at least 2 parameters, 1 given in /home/deneme/deneme.com/cd-key.php on line 17

Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, null given in /home/deneme/deneme.com/cd-key.php on line 18

Fatal error: Uncaught Error: Call to a member function rowCount() on boolean in /home/deneme/deneme.com/cd-key.php:27 Stack trace: #0 {main} thrown in /home/deneme/deneme.com/cd-key.php on line 27