For example, consider below query.
select * from employees where employee_id in (1,2,5,7)
Assume that the employee_id values 1,2,5,7 should be dynamically collected from a webpage provided with checkboxes to select some employees from a list of employees.
Using foreach loop we can create this employee_id string. But it will look like as below
You can note the last comma.
Error will be thrown if we use this as it is
select * from employees where employee_id in ($employee_id_string)
In this case we need to remove this last comma.
It can be easily done by below code.