dio_write
    (PHP 4 >= 4.2.0)
dio_write --       Writes data to fd with optional truncation at length      
Description
int 
dio_write ( resource fd, string data [, int len])
     The function dio_write() writes up to      len bytes from data      to file fd. If len      is not specified, dio_write() writes all      data to the specified      file. dio_write() returns the number of bytes      written to fd.