Warning: Undefined array key "b_id" in C:\xampp\htdocs\www\edoc\admin\bank_del.php on line 4

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1 in C:\xampp\htdocs\www\edoc\admin\bank_del.php:9 Stack trace: #0 C:\xampp\htdocs\www\edoc\admin\bank_del.php(9): mysqli_query(Object(mysqli), 'DELETE FROM tb...') #1 {main} thrown in C:\xampp\htdocs\www\edoc\admin\bank_del.php on line 9