PHP 7 will go “release candidate” on August 20th 2015 which is very exciting because it will instantly be twice as fast as PHP 5.6 (and all previous versions). PHP7 gives HHVM a run for the money and takes 5 minutes to compile instead of hours for HHVM.
But there is a catch – if you have any legacy code that uses the mysql_* functions, they will stop working entirely in PHP 7. Not just a warning, not just deprecated, but gone, fatal.
However, it is easy to get them back without using a wrapper or modifying your code…