Question

Why does the following code output 0 indices?

I want the indices to be: 0 1 2 3 4 .... How do I fix it?

Code:

foreach ($query->result() as $row){
    $data = json_decode($row->residence,true);
    foreach($data as $datum){
        $newArray = array_chunk($datum['units'], 3);
        foreach($newArray as $newA){
            $output = array(implode(",",$newA));
            echo print_r($output).'<br>'; //this is output
        }
    }
}

Output:

Array ( [0] => salam,11,11 ) 1
Array ( [0] => khobe,22,22 ) 1
Array ( [0] => salam,55,55 ) 1
Array ( [0] => khobe,66,66 ) 1

I want this output:

Array ( [0] => salam,11,11 ) 1
Array ( [1] => khobe,22,22 ) 1
Array ( [2] => salam,55,55 ) 1
Array ( [3] => khobe,66,66 ) 1

Update:

My JSON encoded in the database:

[{
    "units": ["salam", "11", "11", "khobe", "22", "22"],
}, {
    "units": ["salam", "55", "55", "khobe", "66", "66"],
}]

Answer 1

In the third foreach, you need to add the $output to a new array, then print_r after the loop.

E.g.

foreach ($query->result() as $row){
        $data = json_decode($row->residence,true);
        foreach($data as $datum){
        $newArray = array_chunk($datum['units'], 3);
        $count = 0;
        foreach($newArray as $newA){
            $output = array($count =>implode(",",$newA));
            $count++;
            print_r($output).'<br>'; //this is output
        }

        }
    }

Or similar.
You might need to move the $count = 0;