Question

here the sample case..

i want to display banner randomly by percentage based on visitor hits.
for example i want to display ads 70% of visitor hits..
the problem is we don’t know how many visitor is.

if it make easier we have set percentage 10%, 20%, 30% … 100%

• and maybe also possible if we save counter per 100 hits and reset

Thanks in advanced.

Answer 1

You don’t need to know about how many visitors. The only thing you need to do is take a random number between 1 and 100, and if it is 70 or lower, it is within this 70% range.

Eventually this will work out, and display the banner to 70% of the people:

if (rand(1,100) <= 70) {
    display_banner();
}

If you want to keep this number, and show it to the user for all page views, then store it in a $_SESSION var of some sort, and based on that value display the banner.