PHP Decode

<?php 
$servername = "localhost"; 
$username = "u275206609_jobs"; 
$password = "Amitsingh@1997"; 
$dbname = "u275206609_jobs"; 
$key == "LKLho2W3rJ5jqaSlrz5yozZ"; 
$adcode = '<div class="d-flex justify-content-center bg-secondary text-white text-center" style="height:100%; width:100%;"> 
   <div class="py-3">Ads Place (middel post)</div> 
</div>'; 
 
$version = "demo"; 
$sitemap_limit = 50000; 
$nav = 1; 
$per_page = "18"; 
 
$POST_replacements = [ 
    "Sarkari Exam" => "innocentamit Sarkari API", 
    "SarkariResultsOfficial" => "innocentamit", 
    "sarkari_Resultc" => "innocentamit", 
    "UEoM_F0GR6cpTH36" => "innocentamit", 
    "WWW.SARKARIRESULT.CO" => "innocentamit", 
    "WWW.SARKARIREESULT.COM" => "innocentamit", 
    "https://sarkarireesult.com/" => "/", 
]; 
 
$TITLE_replacements = [ 
    "Sarkari Exam" => "esarkariresult", 
    "Sarkari Result" => "esarkariresult", 
    "find" => "replace", 
]; 
 
$con = mysqli_connect($servername, $username, $password, $dbname); 
$connect = new PDO( 
    "mysql:host=localhost;dbname=$dbname", 
    "$username", 
    "$password" 
); 
if (mysqli_connect_errno()) { 
    echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
} 
 
$conn = new mysqli($servername, $username, $password, $dbname); 
if ($conn->connect_error) { 
    die("Connection failed: " . $conn->connect_error); 
} 
 
 
?>