Can't pass JSON array with AJAX

Question

I'm trying to get a PHP array with AJAX and turn it into a JSON array.

Right now in the external file I'm echoing the php array with JSON encoding:

echo json_encode($palabras);

Then on the main file I get the response and assign it to variable "jsarray ";

success:function(data_response){
    jsarray = data_response;
    }});

However I can't access jsarray as an array. How can I turn it into a proper array I can access?

Add console.log(jsarray) in the success function and have a look. If nothing is logged then sucess was not called -> error occured. In that case edit your question and add exact output from your php page echoing JSON and also client-side code that is using AJAX. — kubetz
– kubetz, Commented Dec 18, 2011 at 1:20

diofeher · Accepted Answer · 2011-12-18 01:18:54Z

1

You can use eval:

eval(data_response)

You can use jquery.parseJSON too:

var obj = jQuery.parseJSON(data_response);

answered Dec 18, 2011 at 1:18

diofeher

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2 Comments

Tom van der Woerdt Over a year ago

-1 for immediately suggesting heavy libraries such as jQuery.

Pekka Over a year ago

@Tom what's wrong with mentioning jQuery as an additional solution? +1 to even out.

Tom van der Woerdt · Accepted Answer · 2011-12-18 01:18:25Z

0

If you are 100% certain you can trust the contents of data_response, you can simply evaluate it.

I don't know what library you are using, but that should be something like jsarray = eval(data_response.responseText);

WARNING: This does pose a security risk if a third party can inject data into data_response. Since it's a simple eval(), any javascript code can be executed.

I believe that most modern webbrowsers provide a JSON library to work around this issue. You should be able to use JSON.parse(data_response.responseText) in that case. However, that will not work on all browsers.

answered Dec 18, 2011 at 1:18

Tom van der Woerdt

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2 Comments

lisovaccaro Over a year ago

I think that might fix my problem, but I couldn't implement it. alert(data_response) produces: [{"palabra":"aa"}]. If I use eval or JSON.parse I get: [object Object]. But I can't manage to access the object. How can I make get the value on key 1 or "palabra" for example? thanks

Tom van der Woerdt Over a year ago

That looks like an array of objects. If you want to get the first object's value for palabra, you'll want jsarray[0]['palabra']. If you want all palabra values in your arrays, you'll want to iterate: for (var i = 0; i < jsarray.length; i++) { var item = jsarray[i]; alert(item['palabra']); }

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