For this PHP code exercise, create a file named date_formatter.php. This file should contain a function named date_formatter() which accepts one parameter. This parameter should be a string in year-month-day format.

If the string is not in this format or not a valid date, date_formatter() should return an empty string.

If the string is in the correct format, date_formatter() should return a string with the date in Day, Month nth Year format. For example, given 2016-01-14, date_formatter() would return Thursday, January 14th 2016.

Review the PHP Code Exercises documentation for more details on performing code exercises.

Jump on the PHP channel in Slack and ask your fellow students and mentors for a hint.