RE: [PHP] Noting a change to a static web page

If you only have URL access to the file, all you can do is read it in and compare it to the last "cached" version you have. Are you saying that the file is on another system and you don't have regular file access to it? You can't use fopen(), filemtime(), etc? ---John Holmes... > -----Original Message----- > From: DL Neil [mailto:PHPml@DandE.HomeChoice.co.uk] > Sent: Sunday, October 20, 2002 4:23 PM > To: php-general@lists.php.net > Subject: [PHP] Noting a change to a static web page > > How do systems that let you know when a web page has been updated work? > > Over the months/years have developed what started out as a quick-and-dirty > has-it-gone-down check for an IT/intranet/extranet manager (suit type), > into > a URL/links checker, and now he wants to extend it again. On the dynamic > side, the database programming has been tweaked to enable him to review > material as it is being added to the content/updated. So now he wants > something similar on the static pages. He's not in the same office, > indeed > is often away for long periods of time, so doesn't want to > bureaucratically > hold up all updates pending his personal review (thank goodness) - but > wants > to review/doesn't want to 'miss' things either... > > I had thought of using file system functions, eg filemtime(), but these > don't work on remote calls/URLs. > > Then I thought that everytime a page changes, likely its size does too - > but > filesize() suffers the same local filesystem-only limitation. > > Then I noticed the new(er) functions: stat() and fstat() - the manual > doesn't indicate that they suffer a URL limitation (as above). So I'll > give > them a try. > > Meantime, am I on the right approach? > How do the 'commercial'/web-wide systems detect web page changes to send > an > 'alert' to their users/clients? > Can anyone offer an improvement upon the above ideas? > > Please advise, > =dn > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php