OCI-Lob->erase
(PHP 5, PECL oci8:1.1-1.2.4)
OCI-Lob->erase — Erases a specified portion of the internal LOB data
说明
OCI-Lob
int erase
([ int $offset
[, int $length
]] )
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 or FALSE in case of error.
