why some referers doesn't show?

[jdleung]

some referers doesn't show on last seven days referers, their referer are not blank, the visiting time is within a week, and they are not in banned list. some referers have been more than 10 times though.

[jdleung]

no answer?

[blinking8s]

i dont know, even in advance stats systems somethings i get blanks or ++++'s and stuff, this is a world that gets so nitpicky with things...there could be many reasons, as a ref from a system it doesnt understand, such as email though a pda or something...or a spider that has no name...

[Connie]

if the referer is left empty it cannot be recorded

we found out some time ago that these ++++'s are produced by some anonymous surfing product

the referrer-info can be configured in the server-administration, browsers can be configured not to show refererr-info, some "Middleware" for identity protection etc. can do that

there are many possibilities and you cannot take for granted that every visitor will deliver referer info ..

[jdleung]

I mean the referers have all the info in the table(phpmyadmin), and what's important is one of the referer's ip has been recorded for times. but pp don't show it.

[jdleung]

the following referers can be displayed:
http://forum.pixelpost.org/showthread.php?t=4563
http://forum.pixelpost.org/showthread.php?t=4623

and the following referers cannot be displayed:
http://pixelpost.org/v1/index.php?x=downloads&details=172
http://forum.pixelpost.org/showthread.php?t=4438&page=3&highlight=flash

I found the difference is that the second links have "&" in it. and I checked the code.
$nreferer = htmlentities($nreferer);
is it need to use the function htmlentities()?

I deleted it. and works fine.

[jdleung]

will the change cause any problem or security issue?