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timer-controlled input?

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Jul 08.2007

Hi all,
I really need some help 😮

I have to work at a project in a very short time and I do not know where to start from! Please help me 😮

I have to create a website for a teacher who wants to ask some students to connect to the internet at the same time, watch a distance lesson in real time (streaming video, but I am not working at that) and give immediate feedback during the lesson, so she can try to modify the lesson if people are not too interested.

Before worrying about input analysis and output, I have a much bigger problem.
How can I control the input (20 values for each connected student) with a timer? Ideally I would need a button the teacher clicks, which starts a timer, so that before it starts no input is saved in the database. Also, I must save data every minute and for 20 minutes, after which no data is saved.
Also, I would need a ‘stop’ button as well, in case the ‘start’ button has been clicked by mistake. Please save me ?

Have a nice Sunday everyone!!! ?

PS. I shouldn’t worry about that yet, but is there a way to dynamically generate bar graphs with the data of the database?
Thanks a lot ?

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PHP

7 Comments(s) ↴

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@temp_user123Jul 08.2007 — Timer-controlled input is not really suited to PHP, per se -- being server-side only -- especially the "every minute" part. Sounds like you want JavaScript and, specifically, AJAX:

http://jibbering.com/2002/4/httprequest.html
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@happysmileauthorJul 08.2007 — Thank you very much for your answer. I'd better learn something about AJAX then. Thanks a million!!! ?
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@rootJul 08.2007 — PHP can be used to "PUSH" data to a browser connection at regular intervals.
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@temp_user123Jul 08.2007 — PHP can be used to "PUSH" data to a browser connection at regular intervals.[/QUOTE]
Does that involve using a META refresh, though? At least, that is the only way I know of to accomplish what you're describing. As such, the user may not like getting interrupted for those "regular intervals."
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@rootJul 09.2007 — Well I cant remember but I doubt it, you would need to look it up on the www.php.net site as I came across something about using PHP to delay output and also push content updates.
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@temp_user123Jul 09.2007 — I searched but didn't come up with anything.
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@happysmileauthorJul 09.2007 — PHP can be used to "PUSH" data to a browser connection at regular intervals.[/QUOTE]

Hi!!

I am reading some AJAX for real dummies tutorials in internet and it seems (is) very useful. ?

Anyway I am extremely interested in sending data at regular intervals with php. I couldn't find information actually, so please if anyone knows more about that, let me know!

Anyway, thank you all for helping me :o
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