I want to create a website that allows another site to be typed in which will then parse that site , modify certain content then out put the site with the modified content.
E.g. If i have a site mysitemodifier.co.uk goto it and enter https://stackoverflow.com/ for it to parse and say change all instances of the letter "s" to "Z" and then out put the site with the changes.
Sort of a webpage within a webpage.
Any ideas how i would go about creating a site to do this ? I have used php to parse a site and out put it but it simply messes up the css and links and just reads the page rather than outputting it out.
I need it to be webbased rather than an extension like Replace text in website with Chrome content script extension
Any Ideas?