How do I return an array in a response

Question

I'm trying to return an array in HTTP response. I'm thinking to return array as JSON objects. I'm doing echo json_encode($arr) but I get nothing in the response.

UPDATE: I'm running a version of PHP that does not have json_encode method. json_encode was introduced in PHP 5.2. So I guess question is how would you return an array without using json_encode?

     $arr = array();
    foreach($_POST['ids'] as $id)
    {
        $arr[$id] = $id;
    }   
    echo json_encode($arr);

    return;

Here are contents of my array:

array(18) {
  [156795]=>
  string(6) "156795"
  [156800]=>
  string(6) "156800"
  [4292]=>
  string(4) "4292"
  [796053]=>
  string(6) "796053"
  [660520]=>
  string(6) "660520"
 ...

Show us your actual code. We can't debug based on your short description. — webbiedave
– webbiedave, Commented Sep 28, 2011 at 22:10
JSON is definitely the right method. But nothing is wrong here. Show your javascript, and your full server-side method. — Ben Lee
– Ben Lee, Commented Sep 28, 2011 at 22:11

FtDRbwLXw6 · Accepted Answer · 2011-09-28 22:15:25Z

3

Make sure to set the proper MIME type when sending back JSON:

header('Content-Type: application/json');
echo json_encode($arr);

answered Sep 28, 2011 at 22:15

FtDRbwLXw6

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Tak · Accepted Answer · 2011-09-28 22:19:14Z

2

json_encode() requires PHP 5.2.0 or above. Make sure your host hasn't compiled PHP with the --disable-json flag. Both of these can be checked with the phpinfo() function. The code you've posted so far works fine for me.

answered Sep 28, 2011 at 22:19

Tak

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3 Comments

dev.e.loper Over a year ago

Looks like this is it. I have PHP Version 5.1.4 running. What is the next best thing to do in order to return an array?

Tak Over a year ago

You could use a json_encode() alternative - e.g. mike-griffiths.co.uk/php-json_encode-alternative

dev.e.loper Over a year ago

sorry i'm new to php but how would you return array before php 5.2? would you use something like serialize?

Joshua Kaiser · Accepted Answer · 2011-09-28 22:17:06Z

0

json encode should do it with no problems. When I pump that data into an array it works fine. Can you post some code for building the array? What version of PHP are you using?

answered Sep 28, 2011 at 22:17

Joshua Kaiser

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Comments

iThink · Accepted Answer · 2011-09-28 22:26:24Z

0

plz use json validator to make sure ur json is correct

look I did this & it worked fine

 $arr = array();
 $i=0;
    while($i<10)
    {
        $arr[$i] = $i;
        $i++;
    }   
    echo json_encode($arr);

    return;

edited Sep 28, 2011 at 22:26

answered Sep 28, 2011 at 22:21

iThink

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