Questions about Ord ()

The problem with Ord ()
The manual says that it is converted to ASCII, but ASCII has only 127 characters. Why does Ord ("I") still be able to output the results?

------Solution--------------------
Who tell U ASCII only 127?

Plus the extension should have 256.

Ord () is the conversion of the first character of a string into an ASCII code. Chinese is a double-byte encoding.
So Ord ("I") is just the ASCII code of the first character of "Me"
------Solution--------------------
$str = ' I ';
$o 1 = ord ($STR);
$o 2 = ord ($str [0]);
Output $o 1=230 $o 2=230
It's clearly written in the manual.
Returns the ASCII code value of the first character of a string.

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