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Another option is to use the null coalesce operator (??), so if ($_GET["nsfw_options"] == "true") { $sfw = 1; setcookie("nsfw", "true"); $_COOKIE["nsfw"] = "true"; } if ($_GET["nsfw_options"] == "false") { $sfw = 0; setcookie("nsfw", "false"); $_COOKIE["nsfw"] = "false"; } becomes $nsfw = $_GET['nsfw_options'] ?? "false"; // if isset() use its value otherwise set default value ("false") $sfw = $nsfw == "true" ? 1 : 0; setcookie("nsfw", $nsfw); $_COOKIE["nsfw"] = $nsfw;

Yes, positively evil. You can easily display them like that on output but don't store them like that. For example... mysql> select * from project; +----+---------------+-----------+------------+ | id | project_name | client_id | start_date | +----+---------------+-----------+------------+ | 1 | Project Alpha | 4 | 2022-12-01 | | 2 | Proect Beta | 2 | 2023-01-15 | | 3 | Project Gamma | 4 | 2023-03-01 | | 4 | Project Delta | 1 | 2023-03-20 | +----+---------------+-----------+------------+ mysql> select client_id -> , group_concat(project_name separator ', ') as projects -> from project -> group by client_id; +-----------+------------------------------+ | client_id | projects | +-----------+------------------------------+ | 1 | Project Delta | | 2 | Proect Beta | | 4 | Project Alpha, Project Gamma | +-----------+------------------------------+