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.