Back office for html website

**PHP Back Office needed for an html website of 70 pages (in 2 languages, so 70x2), non resizable** We would like to have a back office site, like a mirror of the front site, but with possibility to modify & preview: > text of the page (in a specific layer) + image (in a specific layer). Possibility of rich text : bold, bullet points, color, external links > text and image of "boxes" present in the right column page : those boxes should be resizable (but the total length of the column as a limit). Possibility of rich text : bold, italic, color of the css of the folder, size, external links ** Process of the upload on the server must be defined** **All texts and images must be present in the page**, and not only in a database or external files. The system must read the existing page, cut the page in different blocks, modify the different elements, produce and save a new html file that will replace the previous one (including upload of images), offer a preview before saving.