CODE EXAMPLE FOR PHP

dont insert duplicate data in laravel

$harmFlag = HarmFlag::firstOrNew(['post_id' => $postId, 'harm_id' => $harm_id]);
$harmFlag->gif_flag = $gif_flag;
$harmFlag->save();
or

$harmFlag = HarmFlag::updateOrCreate(['post_id' => $postId, 'harm_id' => $harm_id]);
$harmFlag->gif_flag = $gif_flag;
$harmFlag->save();