some PHP questions???

[fakhir_iqbal]

Hi,
I have 3 questions that are follows:

1) I want to do some calculations when somebody access my application
for example if i want to calculate the no.of clicks of my site. how can
i do it in PHP? I know we can do it in asp through global.asa file by
declaring the application event.

2) I want to schedule a function in PHP?for example I want to run
a specific function or file at a particular time how can
i do it in PHP?

3)I want to send the information to server when clients closes the
browser or when light gets off. how can i do it in PHP?

Regards.

[petitduc]

For your questions 1 and 3, these are client-side events that PHP,being a process that runs on the server, cannot detect as such.
You could write a javascript that submits a form each time a visitor makes a "click" (but what do you call a click ? a clicking on a button, a link, anywhere on the page ?)
but that would be very annoying.
You could count clicks in a javascript global variable and send it in one shot, but its value would be lost if the visitors moves to another page, unless you manage to store it through some dynamic url rewriting method. Would also involve a good deal of Javascript/DHTML.

For question 3, you can use session time out, but I confess I don't know if session is destroyed as soon as the visitor closes the page, or on a time out because he's no longer active.

The point is, the server is only informed of client-side events if the client notifies it in some way or another, generally through form submission or URL rewriting.

[ushna]

Answer the following question

1. REMOTE_ADDR will provide u, ur client IP, due to this IP address, u can chk number of hits.

2. If u want to run ur function at a particular time on LNX then use cron job and if WNT using then Schdule Task.

3. For this, define status flag in ur DB, whenever user do login with ur system and then donot logout properly or light off then it flag remain un-change, on which u can define a tigger... on DB level or with ur script level, u can handle it easily......

bye

[dave420]

Using REMOTE_ADDR to find unique visitors is inherently flawed. Hundreds of thousands of people around the world access the web via webcaches, which are reflected in the REMOTE_ADDR. You'll notice thousands of hits from "webcache.aol.com" or something similar, which could have been made by one person, or thousands of seperate people. You can't tell with REMOTE_ADDR. Also, any time it passes through a NAT device, you'll lose count again.

just my $0.02