Passing Array from Model to Controller to View in CodeIgniter - php

Question

I have a model that sends an error response to the controller in CodeIgniter that then is passed to the view which is just a JSON encoder. Here is the array from the model.
return $posts[] = array('complete'=>0,'error'=>1003, 'message'=>'Username already exists');
The issue I am having is that I need those square brackets after the $posts variable because sometimes I need an array of errors. However when I pass the single array to the view it encodes the JSON without the square brackets but when I have multiple arrays it includes the square brackets, I need the square brackets in the JSON every time. Here is the Controller...
$data['data'] = $this->logins_model->signup($post_data);
$this->load->view('json', $data);
Here is the view...
header('Content-type: application/json');
$response['response'] = $data;
echo json_encode($response);
I need the JSON response to look like this
{
"response": [
{
"complete": 0,
"error": 1003,
"message": "Username already exists"
}
]
}
NOT THIS!
{
"response": {
"complete": 0,
"error": 1003,
"message": "Username already exists"
}
}

Answer 1

Since you want to get array in json you should be having it in php array as well (i.e. data-structures should meet). So $response['response'] = $data; should be $response['response'] = array($data);
In your example var_dump($response); gives:
array(1) {
["response"]=>
array(3) {
["complete"]=>
int(0)
["error"]=>
int(1003)
["message"]=>
string(23) "Username already exists"
}
}
As you see $response['response'] is an object for json.
When you replace $response['response'] = $data; with $response['response'] = array($data); your data-structure, which you want to convert in json will become:
array(1) {
["response"]=>
array(1) {
[0]=>
array(3) {
["complete"]=>
int(0)
["error"]=>
int(1003)
["message"]=>
string(23) "Username already exists"
}
}
}
That will give you desired output because json_encode will expect that there might be another items in $response['response'].
Demo
Edit
Your model should be returning one dimensional array. For example:
return array('complete'=>0,'error'=>1003, 'message'=>'Username already exists');
And you should assign it to another array that is holding all error messages:
$data['data'][] = $this->logins_model->signup($post_data);
$this->load->view('json', $data);
Demo 2

Answer 2

In your view define $post as an array and remove tha square brackets from there. To check your results in view use print_r instead of echo. Which will show exactly how many data is retrieved.