OCI-Lob
PHP Manual

OCI-Lob::erase

(PHP 5, PHP 7, PECL OCI8 >= 1.1.0)

OCI-Lob::eraseErases a specified portion of the internal LOB data

说明

int OCI-Lob::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 或者在失败时返回 FALSE.

参见


OCI-Lob
PHP Manual