# odbc_longreadlen

(PHP 4, PHP 5, PHP 7)

odbc_longreadlen — Handling of LONG columns

### 说明

odbc_longreadlen ( resource `$result_id` , int `$length` ) : bool

Enables handling of LONG and LONGVARBINARY columns.

### 参数

`result_id`

  The result identifier.

`length`

  The number of bytes returned to PHP is controlled by the parameter length. If it is set to 0, Long column data is passed through to the client.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 注释

> Note:

> Handling of LONGVARBINARY columns is also affected by odbc_binmode().