(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
bzerrno — Returns a bzip2 error number
$bz
): intReturns the error number of any bzip2 error returned by the given file pointer.
bz
The file pointer. It must be valid and must point to a file successfully opened by bzopen().
Returns the error number as an integer.