======timefromfat======
WMPRO, WMMINI FW >= 1.0 WMMEGA FW >= 2.0
Convert a FAT filetime to a Linux Timestamp
====Description====
int
timefromfat (
int
$filetime
)
====Parameter====
$filetime: A FAT File Timestamp, seconds since January 1, 1980, 00:00:00, local Wattmon time
====Return Values====
Integer: A Linux Timestamp, seconds since January 1, 1970, 00:00:00, local Wattmon time
====Notes====
Unlike mainline PHP, in uPHP "Linux Timestamps" are based upon the Wattmon's local time, not UTC/GMT.
Technically, the Unix Epoch is defined as being January 1, 1970, 00:00:00 //GMT//. But on the [[hardware:wattmons|Wattmon]], timestamps are relative to January 1, 1970, 00:00:00 //local timezone//.
If the Wattmon clock and timezone are set to UTC+00 (GMT) then the uPHP timestamp //is// the same as mainline PHP, otherwise not.
In uPHP on the Wattmon this simplification is referred to as a "Linux Timestamp" but it should be noted that it may not be exactly the same, depending on the Wattmon's timezone settings.
In other words: Wattmon "Linux Timestamps" are based upon local Wattmon time and are not adjusted by the timezone setting in Control Panel > Time Settings (Time and Date Settings) > UTC Offset. (These settings are stored in ''/config/time.ini''.)
====Functions that Return a FAT File Timestamp====
[[findfirst()]] - Start searching the current folder for files matching a pattern and attributes
[[findnext()]] - Return next matching file information (after a findfirst)
====Also See====
[[software:os:fat_file_system#timestamps|FAT timestamp of last save]]
[[microtime()]] - Return the number of milliseconds since boot
[[mktime()]] - Return the Linux Timestamp for a given date and time
[[settime()]] - Set the system time from a Linux Timestamp, with optional calibration
[[strftime()]] - Format a Linux Timestamp using a format string
[[time()]] - Return the current system timestamp
[[uptime()]] - Return the uptime in milliseconds