Encode Base64 in JavaScript, send with GET, decode in PHP

Question

I thought this will be an easy Google-search, but it seems that my technique is not as common as I thought.

How can I encode a Base64 string in JavaScript, in order to put it safely on the line with a GET parameter (my Base64 string contains a lot of /, + and =, and decode the exact same string in PHP, in order to store it in a database?

When I post the Base64 string without encoding, my PHP script does not accept it.

I found a solution for encoding and decoding the Base64 string in JavaScript, but not in the way it makes sense for me.

Answer 1

So in javascript (updated with encoding URI):

var myStr = "I am the string to encode";
var token = encodeURIComponent(window.btoa(myStr));

btoa example

You should be then able to add that base64 encoded string to your get request.

Then in PHP, after you retrieve the request:

<?php
   $str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
   echo base64_decode(urldecode($str));
?>

base64_decode docs