get first value from array column database - laravel

Question

I need to get the fist item an array from select database using loop for but when i do't my outfit display all the value for array
public function index() {
$hall=DB::table('halls')
->join('imagas','halls.id','=','imagas.id_Halls')
->select('halls.id','halls.hall_name','imagas.image_path')
->get();
$results =[];
foreach ($hall as $halls ) {
$array=$halls->image_path ;
for ($i=0; $i<$array; $i++) {
$halls=$array[0];
}
array_push($results, $halls);
}
return response()->json($results);
}
JSON Output
[
{ "id": 159,
"hall_name": "asdad",
"image_path": "[\"1579635948.jpg\",\"1579635948.jpg\",\"1579635948.png\",\"1579635948.png\"]"
},
{
"id": 160,
"hall_name": "dsfdsf",
"image_path": "[\"1579636069.jpg\",\"1579636069.png\",\"1579636069.png\",\"1579636069.png\"]"
},
]
I want to display the first value from all image_pathlike this
[ {
"id": 160,
"hall_name": "dsfdsf",
"image_path": "["1579636069.jpg"]"
},
]

Answer 1

You may use decode your $hall->image_path string before loop through it
public function index() {
$halls = DB::table('halls')
->join('imagas','halls.id','=','imagas.id_Halls')
->select('halls.id','halls.hall_name','imagas.image_path')
->get();
$results =[];
foreach ($halls as $hall) {
$array = json_decode($hall->image_path, true);
if (is_array($array)) {
$hall->image_path = reset($array) ?? NULL;
array_push($results, $hall);
}
}
return response()->json($results);
}

Answer 2

If I understand you correctly, you want the whole collection data but with modified image_path column, so it contains only the first path, right?
Here is the code using map helper function to output the collection as you desire:
public function index() {
$hall=DB::table('halls')
->join('imagas','halls.id','=','imagas.id_Halls')
->select('halls.id','halls.hall_name','imagas.image_path')
->get();
$results = $hall->map(function ($item, $key) {
is_array($item->image_path) ? [head($item->image_path)] : [$item->image_path];
return $item;
});
return response()->json($results);
// [ { "id": 159, "hall_name": "asdad", "image_path": "["1579635948.jpg"]" },
// { "id": 160, "hall_name": "dsfdsf", "image_path": "["1579636069.png"]" }]
}