Re: [PHP] server sending notifications to clients
On Thu, June 8, 2006 9:24 am, kartikay malhotra wrote: Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Keep a table of notifications and what time they happened, and if the user has seen them -- perhaps even allowing the user to choose which ones to dismiss, perhaps even only having a little icon about notifications if there are any... When the users hits a page, check the notifications table for things they ought to know about. The exact rules of how/when to do what is up to you and your users, but give it a lot of thought before you go annoying the [bleep] out of users with a damn popup for each notification stacked up or something... :-) This takes a lot more thought about WHAT to do from a process/user-interface side than HOW to code it in PHP. -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] server sending notifications to clients
Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM
Re: [PHP] server sending notifications to clients
kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Don't think it can But you can have the client (think AJAX) continuously 'poll' the server, and then the server can send updates back if necessary. -Brad Thanks KM -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] server sending notifications to clients
kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM what kind of event?? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] server sending notifications to clients
[snip] Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? [/snip] You would need a connection with state to do that, web server connections are stateless. The client would have to have a 'listener' waiting for some event to be pushed to them and then the listener would take an action. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] server sending notifications to clients
Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Short answer: It can't. Longer answer: There are probably 100 ways to get close to the result you are looking for. For instance, you could have each page on your site look for a flag in a DB, or a file in the filesystem, or some other clue. Then when the user loads a new page, the page discovers the event, and notifies him. PHP is server side. So everything it generates, it does so on page load. There are PHP/Javascript solutions (like AJAX) that may be able to get closer to what you want. We would need more detail for a more detailed answer. JM -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] server sending notifications to clients
Angelo Zanetti schrieb: kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM what kind of event?? Server bored and fooling around with the neighbor servers hardware :P But Ajax would be the best method using. Anyway else isn't possible (well refreshing would be one way) But since you don't want php files to execute forever you will have to stick to AJAX. -- Smileys rule (cX.x)C --o(^_^o) Dance for me! ^(^_^)o (o^_^)o o(^_^)^ o(^_^o) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] server sending notifications to clients
Barry wrote: Angelo Zanetti schrieb: kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM what kind of event?? Server bored and fooling around with the neighbor servers hardware :P But Ajax would be the best method using. Anyway else isn't possible (well refreshing would be one way) But since you don't want php files to execute forever you will have to stick to AJAX. You can do it without polling. I've seen web applications that open a neverending GET request in order to get updates to the browser instantaneously. Regards, Adam. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] server sending notifications to clients
Dear Adam, You can do it without polling. I've seen web applications that open a neverending GET request in order to get updates to the browser instantaneously. Regards, Adam. Kindly elaborate on neverending GET request. Shall I call the script from within itself? Regards KM On 6/8/06, Adam Zey [EMAIL PROTECTED] wrote: Barry wrote: Angelo Zanetti schrieb: kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM what kind of event?? Server bored and fooling around with the neighbor servers hardware :P But Ajax would be the best method using. Anyway else isn't possible (well refreshing would be one way) But since you don't want php files to execute forever you will have to stick to AJAX. You can do it without polling. I've seen web applications that open a neverending GET request in order to get updates to the browser instantaneously. Regards, Adam. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] server sending notifications to clients
kartikay malhotra wrote: Dear Adam, You can do it without polling. I've seen web applications that open a neverending GET request in order to get updates to the browser instantaneously. Regards, Adam. Kindly elaborate on neverending GET request. Shall I call the script from within itself? Regards KM On 6/8/06, Adam Zey [EMAIL PROTECTED] wrote: Barry wrote: Angelo Zanetti schrieb: kartikay malhotra wrote: Hi All, Is there a way for the server to notify the client about an event, provided the client was online in the past X minutes? To elaborate: A client comes online. A script PHP executes (serves the client), and terminates. Now if a new event occurs, how can the server notify the client about that event? Thanks KM what kind of event?? Server bored and fooling around with the neighbor servers hardware :P But Ajax would be the best method using. Anyway else isn't possible (well refreshing would be one way) But since you don't want php files to execute forever you will have to stick to AJAX. You can do it without polling. I've seen web applications that open a neverending GET request in order to get updates to the browser instantaneously. Regards, Adam. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php I refer to having the javascript code open a GET request that never ends and streaming data from the server back to the client. The server-side PHP process, which stays running, streams back data whenever it becomes available. This of course uses a lot of memory. I have never done this myself in a web application, so I suggest you google for examples of other people who have actually implemented it. Regards, Adam Zey. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
