Exports LOB's contents to a file

# OCILob::export

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

OCILob::export — Exports LOB's contents to a file

### 说明

public function OCILob::export(string `$filename`, ?int `$offset` = `null`, ?int `$length` = `null`): bool

Exports LOB contents to a file.

### 参数

`filename`

  Path to the file.

`offset`

  Indicates from where to start exporting.

`length`

  Indicates the length of data to be exported.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 更新日志

版本 | 说明
--- | ---
8.0.0, PECL OCI8 3.0.0 | `offset` and `length` are now nullable.
8.0.0, PECL OCI8 3.0.0 | The OCI-Lob class was renamed to OCILob to align with PHP naming standards.

### 参见

- OCILob::import

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