Question

I have JSON coming from my server into my javascript like so –

<script>
   var resp = <?php  echo getjsonFromServer() . ';'?> 
   resp=JSON.parse(resp);
   displayStats(resp);
</script>

This yields an error ‘SyntaxError: Unexpected token o’ and when I check the console I see that the response has already been JSON parsed . Meaning I shouldn’t have tried to JSON.parse an already parsed answer .

My question is – how come ? Who parsed my JSON for me ? I’m used to call JSON.parse whenever I get JSON from the server , e.g ajax calls . Why is it not the same here ?

Note – My PHP is something like this

header('"Content-Type":application/json');
$js = json_encode($js);
echo $js;

Answer 1

Look at your generated source.

You’re echoing raw JSON, so your source looks like

var resp = { "property": "value", ... };

That’s an object literal, not a string