OCI-Lob::erase()
(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)
Erases a specified portion of the internal LOB data
说明
OCI-Lob::erase([int $offset[,int $length]]): int
Erases a specified portion of the internal LOB data starting at a specified$offset. If called without parameters, it erases all LOB data.
For BLOBs, erasing means that the existing LOB value is overwritten with zero-bytes. For CLOBs, the existing LOB value is overwritten with spaces.
参数
- $offset
- $length
返回值
Returns the actual number of characters/bytes erased 或者在失败时返回FALSE
.
参见
- OCI-Lob::truncate