title: How to check if a file has changed?
body: <p>I have an xml file with database information that should be loaded when the script is installed or when the content of the file changes. Can I use md5_file() on the xml file and then store the value in the db and compare it to the file's hash each time the script is run? Does it have any drawbacks and are there any other methods that are faster/simpler?</p>