php ftp到本地

<?php
// 连接到FTP服务器
$conn_id = ftp_connect("ftp.example.com", 21);

// 登录FTP服务器
$login_result = ftp_login($conn_id, "username", "password");

if (!$conn_id || !$login_result) {
    echo "FTP connection has failed!";
    echo "Attempted to connect to $ftp_server for user $ftp_user_name";
    exit;
} else {
    echo "Connected to $ftp_server, for user $ftp_user_name";
}

// 设置传输模式为二进制
ftp_set_option($conn_id, FTP_BINARY, true);

// 下载文件到本地
$local_file = 'local_file.txt';
$remote_file = 'remote_file.txt';
$result = ftp_get($conn_id, $local_file, $remote_file, FTP_BINARY);

if (!$result) {
    echo "Couldn't get remote file $remote_file\n";
    exit;
} else {
    echo "Downloaded $remote_file to $local_file\n";
}

// 关闭FTP连接
ftp_close($conn_id);
?>