PHP Manual: Truncates large object

public bool OCILob::truncate(int $length = 0)

Truncates the LOB.

length: If provided, this method will truncate the LOB to length bytes. Otherwise, it will completely purge the LOB.

Returns true on success or false on failure.

Version	Description
8.0.0, PECL OCI8 3.0.0	The OCI-Lob class was renamed to OCILob to align with PHP naming standards.

OCILob::truncate