jQuery Forum

If you have some problem with your PHP, you will need to find some PHP forum to help you with your PHP.

If you need to massage the value into some specific format that you need for MySQL, that is something you can do in PHP. But this forum is about jQuery. You might also change the format around in jQuery, but, really, it would be better to do it on the server, since the reason you need to change is is because of a requirement of your server software (mySQL).

When you have some problem with jQuery, we can help!

If you tell us what date format you need for mySQL, and provide some demo (that does not use PHP, since we do not deal with PHP here - just use plain HTML) then we can show you how to change the date format in jQuery.

jsFiddle or Plunkr are good ways to make a demo.

Actually, in this case I guess it is easier to do it in jQuery, because the JQUI datepicker has a large selection of date formats to choose from. You can set the format both for display, and for retrieval.

You can set the retrieval format to match what you need for mySQL. I don't know what you need.