preg_match("/^[a-zA-Z0-9_]+$/", $accname)
89.221.201.166 - - [15/Jan/2012:00:27:26 -0800] "\xff\xf4\xff\xfd\x06" 200 5911 89.221.201.166 - - [13/Jan/2012:17:51:59 -0800] "e" 200 5911 89.221.201.166 - - [13/Jan/2012:17:52:09 -0800] "\xff\xf4\xff\xfd\x06s" 200 5911 89.221.201.166 - - [13/Jan/2012:18:00:50 -0800] "\xff\xf4\xff\xfd\x06" 200 5911 89.221.201.166 - - [13/Jan/2012:18:00:54 -0800] "\xff\xf4\xff\xfd\x06" 200 5911