[FIX] Monitor plugin 12 hours off

[warnesj]

Hi all, I have a potential fix for anyone experiencing the Monitor page showing the downtime of their hosts out by 12 hours.

SYMPTOM
When a host is down the Monitor page reported the wrong duration of the downtime of the host. The reported time was out by 12 hours if the host had gone down in the afternoon.

PROBLEM
The problem has to do with the ./lib/functions.php script. When a host goes down the status_fail_date value in the host table of the database is set to the current date and time, but for some reason the time that is stored is in 12 hour format instead of 24 hour format. This causes a calculation problem with monitor.php script.

FIX
Modify your ./lib/functions.php script and change all occurrences of $hosts[$host_id]["status_fail_date"] = date("Y-m-d h:i:s"); to $hosts[$host_id]["status_fail_date"] = date("Y-m-d H:i:s");.

I hope this helps. I've also added my functions.php file that has the above mentioned fix.