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# dio_write

(PHP 4 >= 4.2.0, PECL)

dio_write -- Writes data to fd with optional truncation at length

## 说明

int dio_write ( resource fd, string data [, int len] )

dio_write() writes up to len bytes from data to file fd.

## 参数

fd

  The file descriptor returned by dio_open().

data

  The written data.

len

  The length of data to write in bytes. If not specified, the function writes all the data to the specified file.

## 返回值

Returns the number of bytes written to fd.

## 参见

dio_read()

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