PHP official website has been updated recentlyVersion support listSince January 1, 2019, PHP 5.6 is no longer officially supported, and sites using the PHP 5.6 version will no longer receive security vulnerabilities or bug updates. In addition, PHP 7.0 ended its security support on December 1, 2018.
The official support is currently available in three versions: PHP 7.1, 7.2, and 7.3. PHP 7.1 was released on December 1, 2016 and will end in December this year. Users are advised to migrate to the updated 7.2 and 7.3 versions.
according toW3Techs Latest StatisticsThe proportion of PHP used in its research sample was as high as 78.9%, and the proportion of PHP 5 used in these sites was as high as 74.1%, much higher than the PHP 7 series. This also means that there are a large number of websites that are actually a security risk.