Showing ads only to 20% percent of visitors. Or different ads to another 80% visitors

PHP
1

Hi guys, how to do this in a php file

Showing ads only to 20% percent of visitors. Or showing different ads to another 80% visitors

any way that can work, maybe using time intervals, like the visitors that visit the site at minute 0-12 only that show it, and visitors that visit the site at minute 13-59 is not. Or another methode

please help or share if you have, this should be easy enough and many people should need it, already googling it but still cant found it

2

Maybe using rand(1, 100) ?
If the value is 1-20 show one add.
If the value is 21-100 show another.

Being a random generator, on large numbers it should give you your 20-80%.

3

well i’d suggest using mt_rand instead of rand, but yeah. Guido’s answer is the correct one; you cant assume to have the same number of users each minute in order to do a by-time delivery and have it be (over time) accurate to 80/20.

4

Just in case you really wanted to use start/end of hour:


echo (date('i') < 12 ) ? '<img src=banner1.jpg>' :  '<img src=banner2.jpg>';