What is PHP 7?
PHP 7 - a revolution in the field of web development. This is the most important change for PHP since the release of PHP 5 in 2004, bringing explosive performance improvements, drastically reduced memory consumption, and a host of brand-new language features to make your apps soar.
You also be wondering why PHP named its latest release PHP 7 and not PHP 6. Reason behind it is that, many of the PHP 6 releases were already implemented in PHP 5.3 and later, there was not really a proper reason just to change the name. What I am trying to say here is that we haven’t missed anything. Just to avoid the confusion with a dead project, PHP's latest release was named to PHP 7.