定义和用法

ftp_nb_continue() 函数连续获取 / 发送文件。

该函数返回下列值：

1. FTP_FAILED (send/receive failed)
2. FTP_FINISHED (send/receive completed)
3. FTP_MOREDATA (send/receive in progress)

该函数异步地发送/获取文件。这意味着您的程序可以在文件下载时执行其他操作。

语法

ftp_nb_continue(ftp_connection)

实例

<?php
$source = "source.txt";
$target = fopen("target.txt", "w");
$conn = ftp_connect("ftp.testftp.com") or die("Could not connect");
ftp_login($conn,"admin","ert456");
$status = ftp_nb_fget($conn,$source,$target,FTP_ASCII);
while ($status == FTP_MOREDATA)
  {
  $status = ftp_nb_continue($conn);
  }
if ($status != FTP_FINISHED)
  {
  echo "Download error";
  }
ftp_close($conn);
?>