PHP中的非ASCII字符？

Question

I am trying to send something to serial port (r232) with PHP. I am using this class: http://www.phpclasses.org/browse/package/3679.html

The problem is that I am allowed to send only 1 byte. But if I send something like "1", I am actually sending 49 (ASCII for 1). Instead of send("1"), I tried with send(1) but it is no good, because this is integer which has 2 bytes. So is there a way to send a "real" char, not ASCII equivalent?

Answer 1

The chr() function returns a character given by the integer for the corresponding ascii character.