Use the following code to change a View's order when a specific URL parameter and value are set. Replace 123 with the ID of your View, replace my_param with your parameter name, replace custom_value with your specific parameter value, and replace 150 with the ID of the field you want to order by.

There are times you may need to be absolutely sure a value saved in your dropdown/radio field is one of the provided options.

Use this code to make sure the date selected in an end date field comes after the date selected in the start date field. For example, if a user selects July 1st, 2015 for the start date, then the end date field will only allow them to select a date after July 1st, 2015. This code will also make sure the start date comes before the end date.