How to properly encode UTF-8 for JavaScript and JSON?

I have a problem creating an input validation hash. JavaScript submits data to API and API validates the sent data with json_encode. Basically it works like this:

$input=array('name'='John Doe','city'=>'New York');
$validationHash=sha1(json_encode($input).$key); // Key is known to both servers

If PHP connects to another server, then everything works. It also works through JavaScript (I have a custom sha1() function there as well):

var validationHash=sha1(JSON.stringify({'name':'John Doe','city'=>'New York'})+key);

My problem comes when the string contains UTF-8 characters. For example, if one of the values is:


Then PHP server that receives the command converts it to this after JSON encoding:


I need to do this in JavaScript as well, but I haven't been able to work out how. I need to make sure that I send proper validation hash to the server or the command fails. I found from Google that unescape(encodeURIComponent(string)) and decodeURIComponent() could be used, but neither gives me the same string that PHP has and validates with.

UTF-8 is used on both client and server.

Any ideas?



It does not seem to be possible. The only working solution I have found is to encode all data with encodeURIComponent() on browser side and with rawurlencode() on PHP side and then calculate the JSON from these values in arrays.


My fix was to raw url encode my json data like so.

rawurlencode( json_encode( $data ) );

And then from within javascript decode the raw url encoded json and then parse the json string like so.

JSON.parse( decodeURIComponent( data ) );

Hope this helps.


Why not base64 encode the data for safe transport? It encodes UTF-8 characters in a safe string that can be sent across different mediums - php, javascript etc. That way you can base64 decode the string at the receiving end. Voila!

By base64 encoding the data, i mean base64 encoding the values and not the whole json string


is you html page encoding utf-8?

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">


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