Every two weeks I send out a newsletter containing lots of interesting stuff for the modern PHP developer. You can expect quick tips, links to interesting tutorials, opinions and packages. Want to learn the cool stuff? Then sign up now!

Best Practices for Using the Vary Header

Vary is one of the most powerful HTTP response headers. Used correctly, it can do wonderful things. Unfortunately, this header is frequently used incorrectly, which can lead to abysmal hit ratios. Worse still, if it’s not used when it should be, the wrong content could be delivered.


Freek Van der Herten is a partner and developer at Spatie, an Antwerp based company that specializes in creating web apps with Laravel. After hours he writes about modern PHP and Laravel on this blog. When not coding he’s probably rehearsing with his kraut rock band.