I\'m developing a website using PHP and these strange chars \"\" appears in my page, right on the top of it. My code is this:
That's a BOM character, which is there because the source code files are saved as UTF-8 BOM. Try to save them as UTF-8 no-BOM (or whatever your editor calls it) or indeed ISO-8859-1 if you must use it (...why would you?).