php实现的使用ftp自动更新上传文件的代码，有需要的朋友，可以参考下。完整代码。
mirror update=0)) { echo 'can/'t access remote file time.
'; $remotetime=$localtime+1; //make sure of an update } else { echo 'remote file last updated'; echo date('g:i j-m-y',$remotetime); echo '
'; } if(!($remotetime>$localtime)) { echo 'local copy is up to date.
'; exit; } //download file echo 'getting file from server....
'; $fp=fopen($localfile,'w'); if(!$success=ftp_fget($conn,$fp,$remotefile)); { echo 'error:could not download file'; ftp_quit($conn); exit; } fclose($fp); echo file download successfully; //close connection to host ftp_quit($conn);//fget()函数的用法： //ftp_get($conn,$localfile,$remotefile);?>