[SOLVED] JSON issues

Tyler_H72 · 05-30-2012, 03:09 PM

I'm having some trouble getting a JSON request to work properly. I'm trying to send some data from PHP to JS via a JSON object, but I'm not having any luck. The PHP code that does the transfer is as follows:

Code:

$output = array();

$string = $forecast->date->weekday . "<br /> <img src=" . $forecast->icon_url .
" /> <br /> " . $forecast->high->fahrenheit . "&nbsp;&nbsp;" . $forecast->low->fahrenheit . "<br />" . $forecast->conditions . "<br />" ;

$output["day1"] = $string;

echo json_encode($output);

All the variables listed are text/number values pulled from a JSON object (I have tested, and the code was read IN properly, so that's not the issue). I know this may not be the best way to do this, but for now I'm just trying to figure out how to get the transfer to work properly. The JavaScript that is interpreting it is below.

Code:

req.open("GET","GetForecast.php",false);
req.setRequestHeader("Content-Type", "text/plain; charset=UTF-8");
var data = $.parseJSON( "(" + req.responseText + ")" );

This code crashes when it gets to the parseJSON function, probably because it's receiving some mangled nastiness as input. When I print out req.responseText, I get the following:

Code:

{"day1":"Wednesday<br \=""> <img src="http:%5C/%5C/icons-ak.wxug.com%5C/i%5C/c%5C/k%5C/tstorms.gif" \=""> <br \=""> 88&nbsp;&nbsp;57<br \="">Thunderstorm<br \="">","day2":""}

NOTE: the variables used above are, in order, "Wednesday", "http://icons-ak.wxug.com/i/c/k/tstorms.gif", "88", "57", and "Thunderstorm"

Not sure what I'm doing wrong here, but any help would be appreciated. Thanks.

EDIT: I decided this was a pointless way to go about this, so instead I am sending raw JSON to be formatted client-side. However, the interpretation is still failing at the same line as before. I receive properly formatted data this time, as shown below, but the JSON interpreter fails every time. Any suggestions?

Code:

[{"weekday":"Wednesday","icon":"http:\/\/icons-ak.wxug.com\/i\/c\/k\/tstorms.gif","high":"88","low":"57","state":"Thunderstorm"}]

Addition info: I am getting "SyntaxError: JSON.parse: unexpected character" now that I wised up and used some error checking (kinda stupid not to have tried it before, but oh well). However, according to http://jsonlint.com/ my JSON is perfectly valid.

pgpython · 05-31-2012, 03:26 AM

The piece of json is not valid because you have /= in it. I suspect that in the second case your not getting what you think your getting so put some debug lines in to check. I might suggest using something like jquery. to do what you want. I have had great success with it as it allows you to force the content type to be json thereby when you get the json object in your return function parsed and ready to be used for you

Tyler_H72 · 06-01-2012, 06:49 AM

My bad- I already solved this one but I forgot to post about it. You're right- I wasn't getting what I expected. when I printed the data out, I got the JSON listed above, but when I looked at it with FireBug, I saw that I was getting that data wrapped inside HTML and body tags- apparently I had put them in the PHP script for some reason. Works fine now though. Thanks for the help!