If you remember back to the post I wrote, Using PHP to Determine Which Adsense Ad Works Best, we explored ways to split test the performance of Adsense with the help of PHP. I had also promised to share the results of my testing for the month of April. Below are my results. Read more »

I recently read an article that discussed the effectiveness of different adsense ad sizes. The three medium box shaped ads that adsense offers is:

250×250
300×250
336×280

The article mentioned that even though the 336×280 was the largest it wasn’t neccesarily the best performing advertisement since most online advertisers develop their image ads to fit in a 300×250 slot. Read more »

It’s actually very easy to calculate shipping from UPS with PHP once you know how. But at first glance it seems like an impossible task to do. Read more »

In order to send an email notification on your site via php you will probably need some sort of scheduled task program. This will execute the php script routinely. Since I tend to use open source software I used cron. Cron is found in Unix and Unix-like operating systems and is used to schedule commands to be executed periodically. It reads a series of commands from standard input and collects them into a file known as a “crontab” which is later read and whose instructions are carried out. Read more »

I recently needed to implement a way for authenticated users to download files. Normally to host a file for download on a site you would need to provide the url to the download. www.yourdomain.com/restrictedfile.pdf. Read more »