PHP FTP 函数

// 连接到FTP服务器
$ftp_server = 'ftp.example.com';
$ftp_user = 'username';
$ftp_pass = 'password';

// 建立连接
$conn_id = ftp_connect($ftp_server) or die("无法连接到 $ftp_server");

// 登录
if (@ftp_login($conn_id, $ftp_user, $ftp_pass)) {
    echo "成功连接到 $ftp_server\n";
} else {
    echo "无法登录到 $ftp_server\n";
}

// 开启被动模式（推荐用于防火墙后）
ftp_pasv($conn_id, true);

// 获取当前目录
echo "当前目录: " . ftp_pwd($conn_id) . "\n";

// 列出目录内容
$files = ftp_nlist($conn_id, ".");
echo "目录内容:\n";
foreach ($files as $file) {
    echo " - $file\n";
}

// 关闭连接
ftp_close($conn_id);

// 连接到FTP服务器
$conn_id = ftp_connect('ftp.example.com');
ftp_login($conn_id, 'username', 'password');
ftp_pasv($conn_id, true);

// 上传文件（二进制模式）
$local_file = 'local_file.zip';
$remote_file = 'remote_file.zip';

if (ftp_put($conn_id, $remote_file, $local_file, FTP_BINARY)) {
    echo "文件上传成功\n";
} else {
    echo "文件上传失败\n";
}

// 下载文件
$local_file = 'downloaded_file.zip';
$remote_file = 'remote_file.zip';

if (ftp_get($conn_id, $local_file, $remote_file, FTP_BINARY)) {
    echo "文件下载成功\n";
} else {
    echo "文件下载失败\n";
}

// 获取文件信息
$file_size = ftp_size($conn_id, $remote_file);
$file_time = ftp_mdtm($conn_id, $remote_file);

echo "文件大小: $file_size 字节\n";
if ($file_time != -1) {
    echo "最后修改时间: " . date("Y-m-d H:i:s", $file_time) . "\n";
} else {
    echo "无法获取修改时间\n";
}

// 关闭连接
ftp_close($conn_id);

// 连接到FTP服务器
$conn_id = ftp_connect('ftp.example.com');
ftp_login($conn_id, 'username', 'password');

// 非阻塞方式下载大文件
$local_file = 'large_file.iso';
$remote_file = 'large_file.iso';

// 开始非阻塞下载
$result = ftp_nb_get($conn_id, $local_file, $remote_file, FTP_BINARY);

while ($result == FTP_MOREDATA) {
    // 可以在这里做其他事情
    echo "下载中...\n";
    $result = ftp_nb_continue($conn_id);
}

if ($result == FTP_FINISHED) {
    echo "文件下载完成\n";
} elseif ($result == FTP_FAILED) {
    echo "文件下载失败\n";
}

// 非阻塞上传
$local_file = 'large_upload.iso';
$remote_file = 'large_upload.iso';

$result = ftp_nb_put($conn_id, $remote_file, $local_file, FTP_BINARY);

while ($result == FTP_MOREDATA) {
    echo "上传中...\n";
    // 可以在这里显示进度或做其他事情
    $result = ftp_nb_continue($conn_id);
}

if ($result == FTP_FINISHED) {
    echo "文件上传完成\n";
}

// 关闭连接
ftp_close($conn_id);