pack
print(pack("cccc", 65, 66, 67, 68)); print("
\n"); print("
"); print(pack("a10a10", "hello", "world")); print("
\n"); $ff = "F9"; $hex = pack("h*", $ff); $dd = "F9F9"; $dex = pack("h*", $dd); if(eregi($hex, $dex)) { print "hm..\n"; } print "$ff -> $hex\n"; ?>