PHP:Convert a String to Chars
PHP does not have the char type, just numbers and string.
You can convert to and from ASCII values and Strings using ord and chr
You can treat a string as an array of characters
Show character number 2 (the third character) and the ASCII value of this.
See http://www.php.net/manual/en/ref.mbstring.php for details of how to deal with multi-byte strings such as utf-8