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.

Sirko · Accepted Answer · 2013-05-18 16:29:19Z

54

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().

answered May 18, 2013 at 16:29

Sirko

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2 Comments

Sam Over a year ago

This is a comment not an answer

Dogbert Over a year ago

@Sam, what's the answer then?

Baji · Accepted Answer · 2017-06-03 14:41:27Z

6

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 );

edited Jun 3, 2017 at 14:41

answered Jun 3, 2017 at 14:07

Baji

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1 Comment

deltab Over a year ago

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

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