Append Query String To End Of href's and image src attributes in wordpress

PLEASE NOTE : ************************* BIDS THAT DO NOT MAKE AT LEAST SOME RELATIVE COMMENT ACKNOWLEDGING THAT THEY HAVE READ THESE REQUIREMENTS WILL BE IGNORED OBJECTIVE ************* I want to include a query string at the end of each image or attachment url displayed in wordpress For example : An image --------------- <img src="[login to view URL]" An attachment --------------- href="[login to view URL]" Notice the ?query string at end >> "version=2017-03-15-01-01-01" The number represents YYYY-MM-DD HH:MM:SS date format and this represents the date the attachment post was last modified e.g. post_modified field This is not technically a date format but it's the way I want it to appear and I don't want spaces or the : character to appear so these should be replaced with hyphens as shown in the example So the outcome will be this : ***************************** I want all images and attachments shown in the media library and the post editor to have a query string appended to the end of it's href or src attribute (depending on whether it's an image or an attachment) Make use of wordpress filters ************************************* I want you to make use of any wordpress filters to make this as simple as possible How you will deliver it to me ****************************** All I need are a set of functions, so that I can copy and paste this into my [login to view URL] file Hope this makes sense, look forward to your bids