Undefined variable: image while update in laravel - laravel

Question

public function update_room_detail(Request $request)
{
$request->validate([
'room_type' => 'required',
]);
if($images = $request->file('room_image'))
{
foreach($images as $item):
$var = date_create();
$time = date_format($var, 'YmdHis');
$imageName = $time.'-'.$item->getClientOriginalName();
$item->move(public_path().'/assets/images/room', $imageName);
$arr[] = $imageName;
endforeach;
$image = implode("|", $arr);
}
else
{
unset($image);
}
RoomDetail::where('id',$request->room_id)->update([
'room_type' => $request->room_type,
'room_image' => $image,
]);
Alert::success('Success', 'Rooms details updated!');
return redirect()->route('admin.manage-room');
}
In the above code I am trying to update image in database table. When I click on submit button then it show Undefined variable: image and when I use $image='' in else part instead of unset($image) then blank image name save. So, How can I solve this issue please help me? Please help me.
Thank You

Answer 1

As per the PHP documentation:
unset() destroys the specified variables.
What this means is that it doesn't empty the value of the specified variables, they are destroyed completely.
$foo = "bar";
// outputs bar
echo $foo;
unset($foo);
// results in Warning: Undefined variable $foo
echo $foo;
You've already discovered how to handle this:
when I use $image='' in else part instead of unset($image) then blank image name save

Answer 2

Fix:
Note : uses Storage library feel free to use any other.
public function update_room_detail(Request $request)
{
$request->validate([
'room_type' => 'required',
]);
$imageNames = array();
if ($request->hasFile('room_image')) {
$images = $request->file('room_image');
foreach ($images as $item) {
$var = date_create();
$time = date_format($var, 'YmdHis');
$imageName = $time . '-' . $item->getClientOriginalName() .".".$item->extension();
$item->storeAs('/public/room-images-path', $imageName);
array_push($imageNames, $imageName);
}
}
RoomDetail::where('id', $request->room_id)->update([
'room_type' => $request->room_type,
'room_image' => $imageNames,
]);
Alert::success('Success', 'Rooms details updated!');
return redirect()->route('admin.manage-room');
}