PHP5中文手册·Writes data to fd with optional truncation at length -- 追寻梦想＞编程乐园＞PHP 编程

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	PHP5中文手册 Direct IO Directories Direct IO PHP Manual dio_write (PHP 4 >= 4.2.0, PHP 5 <= 5.0.5) 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() Direct IO Directories Direct IO PHP Manual