Danny Van Kooten crunches the numbers on Co2 emissions for websites with high traffic in a recent blog post. He calculates that reducing file size by 1KB on a file that is loaded by 2 million websites reduces emissions by ~2950kg per month. That equates to 5 transatlantic flights between New York and Amsterdam.
Ozgur Alp published an interesting medium post on Newsworthy about second order insecure object direct reference (IDOR) attacks. These cross site scripting attacks can take place when web application redirects are hijacked and identifiers are injected and used in without being validating.
Brent over at Stitcher.io published an illuminating article on the current state of PHP in 2020. He describes the recent evolution of PHP to include strong types, closures and package managers, among other things.