Check for php_sapi_name should be adapted to new PHP versions

In my environment (PHP 7.1.9 cgi-fcgi) `php_sapi_name()` returns `fpm-fcgi`. So in my opinion the check for `cli` on line 14 should be adapted (maybe so it checks if `cli` is contained within `php_sapi_name()`).

Inspect the check on line 14 and trace how php_sapi_name() is used. Reproduce or compare the reported PHP 7.1.9 cgi-fcgi environment with the expected CLI behavior, then define the supported check and verify that the script still distinguishes the intended runtime correctly.

Written by the indexing model from the issue text.