I use atom for my HTML coding editor, so, when i make changes to my style.css(style sheet) which is perfectly linked to .php page, change happens few hours later. Can some one knows why?
This has nothing to do with Atom. Most likely, the CSS is being cached and you should press shift-f5 to clear the cache when you reload the page.
Thanks for trying to help, issue not solved, is there any other way i should try ?
Are you working with files on your computer or a remote server?