FFI::alignof (PHP 7 >= 7.4.0)FFI::alignof — Gets the alignment 说明 public static FFI::alignof ( mixed &$ptr ) : int Gets the alignment of the given FFI\CData or FFI\CType object. 参数 ptr The handle of the C data or type. 返回值 Returns the alignment of the given FFI\CData or FFI\CType object.