The most comprehensive book on PHP 7, written by industry-leading experts. Find out why the successor version of PHP 5 is 7, rather than 6. This ebook has extensive background information about what makes PHP 7 so special, and why the release of PHP 7 opened a new chapter in the future development of the PHP programming language.
This ebook was written by three long-standing, respected members of the PHP community. It contains valuable information about making legacy code work with PHP 7, how to make use of the new features, and how to avoid some pitfalls when migrating to PHP 7.
PHP 7 Explained is one of the greatest books on introducing PHP 7 features. It provides very good examples on each topic while explaining a feature and talks about behaviors and compares them to old versions (if an update happened) then goes with hows and whys of them in-depth.
It starts with a chapter named "Behind the Scenes" that talks about PHP (and more v7) characteristics of its interpretation / compilation process, caching and debugging and ends with a chapter named "Gone" which includes features that are going to be deprecated soon.
You'll find many new things hidden from your sight while reading through the book even from older versions of PHP. That's something I liked the most.
It's consisted of 12 chapters, ten of which talks about features added to PHP 7.0 and not only PHP 7.0. It covers new changes while a new version comes out and got 4 updates so far, so yes it covers 7.2 as well.
I highly recommend it. A book from three educated people in PHP community.