WordPress 5.2 is due out at the end of April, and wit that release the minimum recommended version of PHP PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML. http://php.net/manual/en/intro-whatis.php. will be PHP 5.6.
Minimum PHP Version update
For most plugins this is a non-issue. While we recommend you update your “Requires PHP:” version in your readme.txt, this won’t change the functionality of your code. That field is a minimum version, so if your code works with 7.0 and up, you can set it to `Requires PHP: 7.0` and that will cover 7.1 and 7.2
Also keep in mind, this doesn’t change our policy on PHP versioning, which is to say we still do not have an official version requirement for PHP in your plugins. If you want to support 5.6 forever, feel free. If you want to require 7.1 and up, again, go for it.
You can use a compare to do the basic check:
version_compare( PHP_VERSION, '5.6', '<' )
And remember the goal for your plugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party is “Don’t break things for users.” Stop them from getting fatal errors, and don’t run your plugin if you know it can’t work.