Get Remote IP Address in PHP

function getRemoteIPAddress() {

    $ip = $_SERVER['REMOTE_ADDR'];

    return $ip;

}




The above code will not work in case your client is behind proxy server. In that case use below function to get real IP address of client.




function getRealIPAddr()

{

    if (!empty($_SERVER['HTTP_CLIENT_IP']))   //check ip from share internet

    {

        $ip=$_SERVER['HTTP_CLIENT_IP'];

    }

    elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //to check ip is pass from proxy

    {

        $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];

    }

    else

    {

        $ip=$_SERVER['REMOTE_ADDR'];

    }

    return $ip;

}

Base64 Encode and Decode String in PHP

function base64url_encode($plainText) {

    $base64 = base64_encode($plainText);

    $base64url = strtr($base64, '+/=', '-_,');

    return $base64url;

}

 

function base64url_decode($plainText) {

    $base64url = strtr($plainText, '-_,', '+/=');

    $base64 = base64_decode($base64url);

    return $base64;

}