You can validate url using php filter_var() function using following code.
This post will be focus on creating a Feedback form powered by jquery and PHP. You can add this feedback form to your website to receive feedback’s from your website readers.
Code added to this post will calculate date difference in days, months, years format. So using this code you can calculate age by sending birth date as parameter. Or you can calculate difference between today’s date and any date in past.
Following code will retrieve all file names from a specified folder.