您的位置:寻梦网首页编程乐园PHP 编程PHP5中文手册
PHP5中文手册

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.