DELETE from sessions WHERE expiredt<(UNIX_TIMESTAMP()-10800)
CHECK TABLE sessions FAST QUICK
SELECT * FROM sessions WHERE sid='g2ue0a6if8odjrenbvj571kris'
INSERT INTO sessions SET sid='g2ue0a6if8odjrenbvj571kris', dt_in=NOW(), ip='44.192.247.144', host='', session_lng='rus', expiredt=(unix_timestamp()+10800)
SELECT * FROM sessions WHERE sid='g2ue0a6if8odjrenbvj571kris'
update sessions set script_name='/printer.php' WHERE sid='g2ue0a6if8odjrenbvj571kris'
select cat_id from www_tree where main_page=1