PHPExcel is a package for working with Excel files in PHP. The last version was released in 2015, and it was deprecated in 2017. Still, it has over 27 000 daily downloads - that's tons of legacy code.
Do you use it too? Do you want to switch to PHPSpreadsheet? You can do it today.
In April 2019 we upgraded Glami's big codebase to follow PSR-4.
It was a great success! In this part, we will go through what PSR-4 is and it's benefits.