PHP JSON to Java not parsing due to invisible characters

Question

I am returning some SQL results from PHP to android.

I encode the JSON response as follows:

$json_string = json_encode($rows);
$json_string = str_replace("\\", "", $json_string, $i);
return $json_string;

Once i echo this back to android i get a string which when I place into a JSON validator gives valid JSON code.

HOWEVER....once i try to pass this valid string into a new JSONObject or JSONArray I receive an error that it cannot be converted.

I am sure that this is because of whitespace invisible characters.

I have encoded both my PHP and Java in utf-8 character set using the following in Java...

BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "utf-8"), 8);

and for PHP...

header('Content-Type: text/html; charset=utf-8');

but this has not solved the problem.

Any help greatly appreciated.

pozs · Accepted Answer · 2012-11-14 22:54:06Z

4

That's because you manipulate a valid json representaion with

$json_string = str_replace("\\", "", $json_string, $i);

Don't do that, json_encode already produces a valid json.

And the Content-Type should be application/json for only json output.

answered Nov 14, 2012 at 22:54

pozs

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5 Comments

EHarpham Over a year ago

thanks for the fast reply but I have made the changes you suggest and the valid JSON string will still not convert to a JSONArray or Object

pozs Over a year ago

:) i mean the json string that you say is valid

EHarpham Over a year ago

im not sure what you mean. the string is valid as i have copy and pasted it into jsonlint to check it. for some reason though it will not accept it in JSONArray()

pozs Over a year ago

i mean f.ex. {"a":1,"b":2} is a valid json string. update your question to contain the samples you tried to feed JSONObject or JSONArray

Squonk Over a year ago

@EHarpham : As pozs says, paste the JSON string that you are working with so we can see it. Also, post the code that you're using to parse the string and the logcat error showing where it's failing.

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