I use quite a good text editor that can globally replace the old URLs with the new URLs. Zip the files, send me the link to download the zip file and I will do the changes and forward them to you.
If you want all mentions of the old domain changed, leave off the “http://”.
A good editor will hi-lite the found instances, let you inspect to be sure nothing went wrong, let you test a single instance, and then if all is copacetic, do a global replace (or some other action).
Yes, either use a “Search and Replace” or a ‘regular expression’ to do a site-wide or text/folder change within the code. Like as mentioned many good Editors can do this and another free open source example is; Notepad++
Furthermore you may want to later use - if on *nix - the .htacess to redirect from old style file/directory locations so that visitors don’t end-up on dead-end islands.
The safest thing to do (if you are on Apache) is to use mod_rewrite, which (as you might guess from the name) rewrites URLs from one form to another as and when people request pages from the server. This ensures that anyone visiting your site using an old URL will get to the right page - whether that’s from a link on your own site, a link on someone else’s site, a search engine that hasn’t updated its index, or an out-of-date bookmark.
Whenever you change the URL of a page, whether it’s one page being moved, a website being restructured, or the whole site being moved en masse to another domain - you should always use mod_rewrite or a 301 redirect to ensure that anyone going to the old URL gets taken to the correct page without needing to take any action.
