PHP Manual . Prev . Next . PHP 3 <= 3.0.18, PHP 4 >= 4.0.0) filemtime -- Gets file modification time . ... Returns the time the file was last modified, or FALSE in case of an error. ... The results of this function are cached. ... Note: This function returns the time when the data blocks of a file were being written to, that is, the time when the content of the file was changed. Use date() on the result of this function to get a printable modification date for use in page footers. ...