dio_write -- Writes data to fd with optional truncation at Length
說明
int dio_write ( resource fd, string data [, int len] )
dio_write() writes up to len bytes from data to file fd.
參數
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.
