[SOLVED] Single byte socket send...

[omegad]

I am trying to be able to send data one byte at a time over a TCP socket connection. I want to be able to send hex directly and not use ascii. Right now when I send 0xFF it comes out on the other end as the decimal ascii value not the hex value like it would if i sent a byte in c++. I know the php does not handle bytes but, is there a way to force this?

[btherl]

I don't understand your question.  There is no distinction in either php or c++ between a hex value and an ascii value.

 

What happens when you display the decimal ascii value as hex?

[omegad]

Sorry I guess what i really want to do is send a byte of data from a php socket like I could in C++. The problem is that I need to interface with a binary protocol not an ascii one. What I am trying to do is send data to a networked micro controller which is only 16 bit.

 

Within php the value I send goes through as ascii. In C++ if I have a byte variable and I set it to 0x15 when it gets to the client it comes out as 0x15. In php, however if I set a variable to 0x15 and send it to the client it comes out as ascii 15 a.k.a 0x31 0x35 two bytes not one. I could send single chars since each ascii char is a byte, ex A = 0x41, B = 0x42, etc. However this only gives me a range of 0x21 through 0x7E which does not work for what I need. So I was wondering if there were a way to send straight hex not ascii?

[omegad]

Ok so I figured it out... if I use:

socket_write($socket, chr($in), strlen(chr($in))); 

Where $in is the value I want to send, php will convert it to a single byte.