php - 在mysql表的列中按其位置(以逗号分隔)一次删除一个值

Question

This is table that has all the skills which candidate can add to their profile in candidate table

And this is where candidate has added desired skills which is separated by comma,

现在我陷入困境，问题是我如何删除那些我不想再出现在我的个人资料中的技能。这是用逗号分隔的，这就是为什么我发现它单独删除

$sql_r = "select expert_skills, inter_skills, beginner_skills 
            from user_personal_details 
            WHERE upd_user_id = '". $_SESSION["user_id"] ."'";

$skills_render = $this->model->execute_query_all($sql_r);


$arr1=explode(",",$skills_render['0']['expert_skills']);

$ty = array_keys($arr1);
$ty1 = array_values($arr1);

$location = $_POST['skill_location'];

echo $location;

$location 变量，即技能 ID，我从前端获取，如何按位置删除

Answer 1

您可以使用 array_diff( [3, 2, 1, 5], [2] ) 将得到 [3, 1, 5]