(PHP 4, PHP 5, PHP 7)
gzrewind — Rewind the position of a gz-file pointer
gzrewind ( resource $stream ) : bool
Sets the file position indicator of the given gz-file pointer to the beginning of the file stream.
stream
The gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen().
 Returns true on success or false on failure. 
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    https://www.php.net/manual/en/function.gzrewind.php