note 85864 added to function.md5-file

I need to parse a big file after it was changed (a shared XLS file). I've fond a good idea to check once a minute the checksum of the file, in order to track if it was changed or not. Here is my code, hope will help some one. Any improvements are welcome! <?php $file_xls = "test.xls"; $file_md5 = "test.xls.md5"; // Must exists and must be writable for PHP $md5_new_file = trim(md5_file($file_xls)); $md5_old_file = trim(file_get_contents($file_md5)); if($md5_new_file <> $md5_old_file) { echo "file is out of date, updating now..."; rename($file_md5, $file_md5.".bak"); $fp = fopen($file_md5, 'w'); fwrite($fp, $md5_new_file); fclose($fp); /* Here we do some job... In my case - dealing with "Spreadsheet Excel Reader" */ unlink($file_md5.".bak"); } // "Not for crontab" - Remove the following section if you are intending to run it in crontab else { echo "file is up to date, nothing to do..."; } // End "Not for crontab"; ?> ---- Server IP: 89.28.118.75 Probable Submitter: 193.46.212.100 ---- Manual Page -- http://www.php.net/manual/en/function.md5-file.php Edit -- https://master.php.net/note/edit/85864 Del: integrated -- https://master.php.net/note/delete/85864/integrated Del: useless -- https://master.php.net/note/delete/85864/useless Del: bad code -- https://master.php.net/note/delete/85864/bad+code Del: spam -- https://master.php.net/note/delete/85864/spam Del: non-english -- https://master.php.net/note/delete/85864/non-english Del: in docs -- https://master.php.net/note/delete/85864/in+docs Del: other reasons-- https://master.php.net/note/delete/85864 Reject -- https://master.php.net/note/reject/85864 Search -- https://master.php.net/manage/user-notes.php