The PHP team have just released PHP 7.3.0, the new stable release will be actively supported for the next two years until 6 December 2020, and will get security support until 2021.
PHP 7.3.0 introduces flexible Heredoc and Nowdoc syntax, trailing comma in functions calls, and list() reference assignment.
In the new PHP 7.3.0, json_encode and json_decode will through exception on errors. In addition to the introduction of three new functions : is_countable(), array_key_first() and array_key_last().
Of course in addition to many bugfixes and few deprecation such as image2wbmp(), case insensitive constants, and FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED flags used with FILTER_VALIDATE_URL.
Complete changelog for this release is available here, migration guide is available to go from 7.2.x to 7.3.x, upgrade to PHP 7.3.0 today.