OCI-Lob::erase

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

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

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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.

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offset

length

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Returns the actual number of characters/bytes erased ������ʧ��ʱ���� FALSE.