There is a website, with iframe. I frame source is correct, but won’t display content of the website. No visible errors. There only small detail in the console:

Load denied by X-Frame-Options: https://... does not permit cross-origin framing.

Some crazy admin figure out that it’s going to be better… and put some crazy code into headers:

X-Frame-Options: SAMEORIGINX-XSS-Protection: 1; mode=blockX-Content-Type-Options: nosniff

Solution: talk to the hand, because admin won’t listen ;P

When you start looking for a solution, you will find answers like using Cloudfront, lambda, and middleware 3rd party services. And basically, you don’t have any other choice. There is no simple solution to your problem. But – as long as you use Caddy Server solution is super easy.

I recently worked on a project with a super dull address form. I figured out that we need to help poor users fill tedious forms, so I made a little code snippet/function which gets the postcode and returns the state. I took postcode ranges from wikipedia , so blame them if something isn’t working as expected.

Small 2019 update – Please check out this library – github.com/maxmind/MaxMind-DB-Reader-php

It’s a straight replacement of PHP module.

GeoIP extensions is quite use-full, but it requires some server – side magic. If you are looking for something simpler, just go with  ipstack.com or something similar – GeoIP .

Otherwise:

wget http://pear.php.net/go-pear.phar
php go-pear.phar

We need geoip-devel libraries:

yum install geoip-devel

And newest (not stable) version of geoip:

sudo ./pecl install geoip-1.1.1

Don’t forget to add extension=geoip.so to your php.ini file.

Cross browser testing is a standard part of the testing process. No matter what you build – small page, online form or huge service. It’s really important to test it across multiple browsers.