(PHP >= 5.3.0, PECL fileinfo >= 0.1.0)
finfo_close — Close fileinfo resource
finfo_close ( resource $finfo ) : bool
This function closes the resource opened by finfo_open().
finfo
Fileinfo resource returned by finfo_open().
 Returns true on success or false on failure. 
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    https://www.php.net/manual/en/function.finfo-close.php