RE: [PHP] Automatic Change without reload button

A while ago I saw a web page explaining a system (written in Perl I think) that was used to show a presentation to a number of different sites simultaneously (and synchronised). A presenter was a the main site and the browsers at 4 other remote sites would display the same page the presenter was viewing on his web browser as he went to various sites. I think it worked using multipart Content-type. Unfortunately I have lost the URL to the explanation of how it was done. I have been experimenting with <?php header("Content-type: multipart/mixed;boundary=ThisRandomString"); print("\n"); print( "--ThisRandomString\n"); print("Content-type: text/html\n"); print("\n"); print( "First update at "); echo date("H:i:s"); print("\n\n"); print( "--ThisRandomString\n"); flush(); sleep( 5); print("Content-type: text/html\n"); print("\n"); print( "Second update at "); echo date("H:i:s"); print("\n\n"); print("--ThisRandomString--\n"); ?> but it doesn't work :-( If anyone knows how to get this working, I would love to know. Regards Andrew Braund > -----Original Message----- > From: joarmc@swbell.net [mailto:joarmc@swbell.net] > Sent: Saturday, 16 September 2000 12:02 > To: Pepen > Cc: php-db@list.php.net; php-general@lists.php.net > Subject: Re: [PHP] Automatic Change without reload button > > > On Sat, 16 Sep 2000, Pepen wrote: > > > Hi Everyone, > > > > how to make a page that view data from MySql table that the data > > is automatic change if the the content of table was change, without > > press the reload button in browser > > > > Thank's > > Pepen > > Well, the base answer is, "You can't do that." Not entirely true, of > course. When a person goes to your web site, each interaction is > separate. There is no permanent TCP/IP connection. So you > don't have a way > to send another page to them until they request it. Now, > what you could > do, is have your page send a Java program to the remote > site. This Java > program would then open a socket to a server at your site. When your > server tells the Java program that the database has been > updated, the Java > program on the client would then request the data and > display it. This > would really be more or less independant of your Web page and their > browser. The other thing you might be able to do is have a > small Java or > JavaScript program which would do an automatic refresh from > the client > side. But there is NO way for the Web server to contact the > client's browser > except when the client requests it. > > John > > P.S. no, I don't know how to write such a client-side > requestor, sorry.