OCI-Lob::erase
(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)
OCI-Lob::erase — 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.
