(PHP 7 >= 7.1.0)
sapi_windows_cp_is_utf8 — Indicates whether the codepage is UTF-8 compatible
sapi_windows_cp_is_utf8 ( ) : bool
Indicates whether the codepage of the current process is UTF-8 compatible.
This function has no parameters.
Returns whether the codepage of the current process is UTF-8 compatible.
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https://www.php.net/manual/en/function.sapi-windows-cp-is-utf8.php