Why are all indices in an array 0? - php

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

On this line $output = array(implode(",",$newA)); you are creating a new array for each set of results, so the offset with always start at 0.
Try this:
$output = array();
foreach ($query->result() as $row){
$data = json_decode($row->residence,true);
foreach($data as $unit) {
$output[] = implode(',', $unit['units']);
}
}
print_r($output);
I get the following output from a single row:
Array
(
[0] => salam,11,11,khobe,22,22
[1] => salam,55,55,khobe,66,66
)

Answer 2

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;

Answer 3

Try this instead
$output[] = array(implode(",",$newA));

Answer 4

You can do so by using a standard for loop like this instead of the foreach loop:
for ($i = 0; $i < count($newArray); $i++) {
// ...
}

Answer 5

You are creating all separate arrays every time you call the array function. To add items to the same array, use $output[] = $valueToAdd:
$output = array();
foreach ($query->result() as $row){
$data = json_decode($row->residence,true);
foreach($data as $datum){
$newArray = array_chunk($datum['units'], 3);
foreach($newArray as $newA){
$output[] = implode(",",$newA);
}
}
}
print_r($output).'<br>'; //this is output