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Not sure what this comes under header,chr, sockets; Help

Discussion in 'PHP' started by Big 'G', Oct 13, 2006.

0
  1. #1
    Okay most php stuff doesnt faze me and the ones that do i usually find the answer to with the follorwing exception.

    Task:
    I am looking at creating sockets for sending/recieving info. In this case RCON commands to a game server. I have come across a script that do what i need but am confused as to the following bit:confused: :confused: 
    
  $send = chr (0xFF) . chr (0xFF) . chr (0xFF) . chr (0xFF) . "rcon " . chr (0x00);//Some details ommited
        $resp = "/\xFF\xFF\xFF\xFFprint\x0A/";
    Code (markup):
    Question:
    What are the chr (0xFF) and "/\xFF\xFF\xFF\xFFprint\x0A/" for? what function they perform.
    I understand they are ascii charcter,unsure which ones though, but unsure what they represent and more important why the do.

    Can any one enlighten me or provide a tutorial on this aspect of programming.
    Many Thanks
     
    Big 'G', Oct 13, 2006 IP