PHP Help converting diacritic characters to HTML quotes

[yoyov]

This one's driving me nuts . . .I have a bunch of MS Word files that a client wants displayed on his web site. I've converted them to HTML using "Save as Web Page" -- and yes I know that this produces lousy HTML but other methods I've tried lose the links to the imbedded images.For the most part, I can use PHP to clean up the display but one item has me completely baffled: All single and double quotes are coming through as various letters with diacritics (accents) and I can't figure out how to detect them and convert them to the correct HTML entities. For example: ? (O tilde)should be single-quote,