Where can I find a list of French special characters for transliteration?

Question

Transliteration

It is necessary to form on the fly url for cnc from title. To do this, I have a script, everything is fine with the Russian language, but there is a problem with French. I do not know what characters can be found there and what is the correct way to replace them.
Someone came across, maybe someone has the form of an array:
'é': 'e',
In the search, I found only the alphabet, but there are no symbols like é

Answer 1

the most versatile solution

setlocale(LC_ALL, "en_US.utf8");                                                
 $text = iconv('UTF-8',  'ASCII//TRANSLIT', $text);