在 PHP 網站上的「Supported Versions」可以看到 PHP 5.5 將要停止支援了:
PHP 5.6 因為是 PHP 5 的最後一個版本,有特殊待遇,時間會拉的比較長 (功能性更新多四個月,安全性更新多一年):
As it is the final PHP 5 release, support for PHP 5.6 has been extended: active support will run for an additional four months, and the security fix period has been doubled from one to two years. Other releases are unaffected.
話說 PHP 7.1 也在 alpha 階段了...