PHP でのデバッグ関数 debug_backtrace の使用の概要

public function update(Request $request, $id)
{
 dd(debug_backtrace());
 $getGameID = function ($request) {
 if (!$request->game_id) {
  return 1000 + intval($request->id);
 }
 return $request->game_id;
 };
 
 $previews = $this->getGamePreviews($request->game_preview);
 
 $request->merge([
 'game_preview' => json_encode($previews),
 'game_id' => $getGameID($request)
 ]);
 EgretGame::where('id', $id)->update($request->except(['_token', '_method']));
 return redirect()->route('egretgame.index')->with('success', '编辑成功！');
}