PHP: Return the last json object

Question

Edit

Thanks for all the input on this, I did find error in my question so modifying now. Sorry for that.

I am trying to figure out how to return the last object in the JSON string I have rendered. The two functions I am working with:

public function revision($return = false)
    {
        $id = $this->input->post('galleryID');
        $data = array('revision_count' => $this->revision->count_revision($id) );

        if($return){
            return json_encode($data);
        }
        else {
            echo json_encode($data);
        }
    }

public function last_revision()
        {
            $allRevisions = json_decode($this->revision(),true);
            return end($allRevisions);
        }

The issue is that end() returns error stating that 1st parameter should be array.

Thanks for any help on this.

edit_revision doesn't return anything, it outputs the json encoded array $data. — Musa
– Musa, Commented Dec 7, 2012 at 19:53

Colin M · Accepted Answer · 2012-12-07 21:08:12Z

1

It is important to note here that json_decode returns an instance of stdClass by default. Try using json_decode($jsonstring, true) to return the JSON as a PHP associative array.

However, You haven't included what the $this->revision() method does. Could you possibly show that portion of the code, since that is the function you are getting a return value from?

Edit:

Alright, after we saw the right function in your code, here are a couple of things I would like to say:

You have added a $return parameter to your revision method, but you aren't using it when you need to. You should change $this->revision() to $this->revision(true) in your last_revision method.
If you're going to return data from the revision() method, there's not much of a point in json_encodeing it, just to json_decode the result. Just pass back the raw data array.
Once you have changed both of these things, this should work:

$allRevisions = $this->revision(true); return end($allRevisions['revision_count']);

edited Dec 7, 2012 at 21:08

answered Dec 7, 2012 at 20:48

Colin M

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2 Comments

SuperNinja Over a year ago

Thanks, I have modified my question your comment helped discover a fault in my original question.

SuperNinja Over a year ago

Thanks Colin - well explained and again sorry for the confusion in my orginal question.

Plamen Nikolov · Accepted Answer · 2012-12-07 20:24:20Z

1

You can change the edit_function() to:

public function edit_revision($return = false)
{
  $galleryID  = $this->input->post('galleryID');
  $revisionID = $this->input->post('revisionID');

  $data = array('revision_images' => $this->revision->get($galleryID, $revisionID) );

  if($return)
    return json_encode($data);
  else
    echo json_encode($data);
}

and then:

public function last_revision(true)
{
  $allRevisions = json_decode($this->revision());

   return end($allRevisions);
}

edited Dec 7, 2012 at 20:24

answered Dec 7, 2012 at 19:54

Plamen Nikolov

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4 Comments

SuperNinja Over a year ago

thanks for the help on this. $allRevisions is not being returned as array, thus end() is throwing error.

Plamen Nikolov Over a year ago

See my last edit, just add the paramater true to the last_revision call.

SuperNinja Over a year ago

thanks, that didn't do the trick, even if I set $return = true, I am still getting end() parameter 1 not an array.

SuperNinja Over a year ago

this is the answer if you could modify your code to my updated question and pass true to revision() -- Sorry for the mistake in code in original question $this->revision(true)

Dennis Ruiz · Accepted Answer · 2012-12-07 19:56:41Z

0

Maybe you need convert that json output to an php array (json_decode() function), then you could get the last item with array_pop() function: https://php.net/array_pop

answered Dec 7, 2012 at 19:56

Dennis Ruiz

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