If this flag contains "true" on return, the resulting list is filtered.
Structure of the returned record
Array
(
[ID] => the session ID
[GUEST_ID] => the visitor ID
[NEW_GUEST] => [Y|N] flag: new visitor
[USER_ID] => the ID of a user under which the visitor
was last authorised
[USER_AUTH] => [Y|N] flag: whether the visitor was authorised
during this session
[C_EVENTS] => number of events occurred during this session
[HITS] => number of hits occurred during this session
[FAVORITES] => [Y|N] flag: the site was added to Favorites
[STOP_LIST_ID] => the ID of the stop list record
for the visitor (if applicable)
[COUNTRY_ID] => the visitor country ID
[USER_AGENT] => the visitor UserAgent
[URL_FROM] => the referring page of the first session hit
[DATE_STAT] => date of the first hit
[DATE_FIRST] => time of the first hit
[URL_TO] => the first page of the session
[URL_TO_404] => [Y|N] indicates the error 404 occurred
on the first page of the session
[FIRST_HIT_ID] => the first hit ID
[FIRST_SITE_ID] => the ID of the first hit site
[IP_FIRST] => the visitor IP address during the first hit
(in the form XXX.XXX.XXX.XXX)
[IP_FIRST_NUMBER] => the visitor IP address during the first hit
(numerical)
[DATE_LAST] => date and time the last hit occurred
[URL_LAST] => the last page of the session
[URL_LAST_404] => [Y|N] indicates the error 404 occurred
on the last page of the session
[LAST_HIT_ID] => the last hit ID
[LAST_SITE_ID] => the ID of the last hit site
[IP_LAST] => the visitor IP address during the last hit
(in the form XXX.XXX.XXX.XXX)
[IP_LAST_NUMBER] => the visitor IP address during the first hit
(numerical)
[ADV_ID] => the advertising campaign ID
[ADV_BACK] => [Y|N] flag: direct hit (N)
or return (Y) under an advertising campaign
[REFERER1] => the referer1 identifier of an advertising campaign
[REFERER2] => the referer2 identifier of an advertising campaign
[REFERER3] => the referer3 auxiliary parameter of an advertising campaign
[SESSION_TIME] => time difference between the first and last hits (sec.)
[PHPSESSID] => the PHP session identifier
)