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On my page, the text in the top middle (« Ce site Internet. ») contains E with accents which on my computer appear as question marks.
This is despite the fact that I have meta charset="UTF-8" in my head tag and the PHP file containing the text appears as UTF-8 when opened with Notepad++.
What's going on then?
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Insert Accented Letters with Keyboard Shortcuts You'll use the Ctrl or Shift key along with the accent key on your keyboard, followed by a quick press of the letter. For example, to get the á character, you'd press Ctrl+' (apostrophe), release those keys, and then quickly press the A key.
Open Microsoft Excel. Select the Insert tab on the Ribbon or click Insert in the menu bar. On the Insert tab or the Insert drop-down, select the Symbol option. Select the desired accented character or symbol from the list of symbols.
Since ASCII bytes do not occur when encoding non-ASCII code points into UTF-8, UTF-8 is safe to use within most programming and document languages that interpret certain ASCII characters in a special way, such as / (slash) in filenames, \ (backslash) in escape sequences, and % in printf.
UTF-8 (UCS Transformation Format 8) is the World Wide Web's most common character encoding. Each character is represented by one to four bytes. UTF-8 is backward-compatible with ASCII and can represent any standard Unicode character.
The browser displays these when it can’t make sense of the numbers it is reading. UTF-8 is self-synchronzising. Unlike other multi-byte character encodings, you always know where you are with UTF-8. If you see a number 192-247, you know you are at the beginning of a multi-byte sequence. If you see 128-191 you know you are in the middle of one. There’s no danger of missing the first number and garbling the rest of the text. This means that in UTF-8, the sequence 191 followed by 224 will never occur naturally, so the browser doesn’t know what to do with it and displays �� instead.
Use the following in your head tag:
<meta charset="UTF-8">
<meta http-equiv="Content-type" content="text/html; charset=UTF-8">
See: http://coding.smashingmagazine.com/2012/06/06/all-about-unicode-utf8-character-sets/
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