Notice: Undefined index: user_id in C:\xampp_5\htdocs\website\wgd\delete.php on line 3

Notice: Undefined variable: id in C:\xampp_5\htdocs\website\wgd\delete.php on line 3

Notice: Undefined variable: link in C:\xampp_5\htdocs\website\wgd\delete.php on line 4

Notice: Undefined variable: sdata in C:\xampp_5\htdocs\website\wgd\delete.php on line 4

Warning: mysqli_query() expects parameter 1 to be mysqli, null given in C:\xampp_5\htdocs\website\wgd\delete.php on line 4