JavaScript atob operation using PHP

Question

I would like to know if it is possible to decrypt the JavaScript encrypted text (which is encrypted using JavaScript's btoa function), using PHP.

Solution 1

Have a look at base64_decode().

JavaScripts btoa() just encodes a string using Base64. The PHP functions for that are base64_encode() and base64_decode().

Solution 2

When I use window.btoa(String) to encode (not encrypt) text and send it over to the server side via AJAX, I find that the client-server exchange has resulted in plus signs ('+'), in the encoded text, being replaced by spaces (' ').

To get the text back to proper encoding in PHP, I've had to use string transform like so:

$clean = strtr( $_POST['ajax-text'], ' ', '+');
$ascii = base64_decode( $clean );

Comments

[Sam]

This is a comment not an answer

[Dogbert]

@Sam, what's the answer then?

[deltab]

Sounds like you've sent the encoded text in the query string of a URL. You should encode it using encodeURIComponent before inserting it.