set the last modified time of the specified file.
"file" - the file to set the last modified time of.
time - the new modified time of the file specified as a scalar long in milliseconds since the epoch.
Returns the filename if the operation was successful, otherwise $null is returned.
# yes Professor, I submitted the homework on time, look at the timestamp. $oneDayAgo = lastModified("homework.tgz") - (24 * ((60 * 1000) * 60)); setLastModified("homework.tgz", $oneDayAgo);