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Why can't php 4 on my apache 2 server find the $HTTP_USER_AGENT variable (it says undefined)?

Feb 29th, 2008 09:44
dman, Jens Clasen, Eric Dingle, http://www.ttnr.org

You will probably have a PHP-version >= 4.2.0 where register_globals is
turned off by default. Therefor all predefined vars are not global any
longer but availlable using the so called "Superglobals".
In your case $HTTP_USER_AGENT can be found in $_SERVER as