(PHP 4 <= 4.1.0, PECL dbplus >= 0.9)
dbplus_prev — Get previous tuple from relation
Reads the data for the previous tuple for the given relation, makes it the current tuple and will pass it back as an associative array in tuple.
Returns DBPLUS_ERR_NOERR on success or a db++ error code on failure.
此函数是实验性的。 此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本扩展风险自担 。