How to search and download files on FTP server via PHP

How to search and download files on the FTP server through PHP

Introduction:
In the process of web development, sometimes we need to operate the FTP server through PHP, such as searching and downloading files. This article will introduce how to implement file search and file download on FTP server through PHP.

1. Connect to the FTP server
First, we need to connect to the FTP server through the PHP function ftp_connect(). The function is used as follows:

$conn = ftp_connect($ftp_server, $ftp_port, $timeout);

Among them, $ftp_server represents the address of the FTP server, $ftp_port represents the port number of the FTP server, the default is 21,$timeout represents the timeout period of the connection.

2. Log in to the FTP server
After the connection is successful, we need to log in to the FTP server through the PHP function ftp_login(). This function is used as follows:

$login_result = ftp_login($conn, $ftp_username, $ftp_password);

Among them, $conn represents the handle of the connected FTP server, $ftp_username represents the user name for logging in to the FTP server, $ftp_password represents the password to log in to the FTP server.

3. File search
After successful login, we can use the PHP function ftp_nlist() to obtain a list of all files and directories in the specified directory on the FTP server. This function is used as follows:

$file_list = ftp_nlist($conn, $remote_directory);

Among them, $conn represents the handle of the connected FTP server, and $remote_directory represents the directory to be searched. This function returns an array $file_list, which contains the paths of all files and directories.

4. File download
If we want to download files on the FTP server, we can use the PHP function ftp_get() to achieve it. This function is used as follows:

$download_result = ftp_get($conn, $local_file_path, $remote_file_path, FTP_BINARY);

Among them, $conn represents the handle of the connected FTP server, $local_file_path represents the path to the local storage file, $remote_file_path represents the path of the file on the FTP server, FTP_BINARY specifies the file transfer mode.

For example, we can achieve file downloading in the following ways:

$local_file_path = 'C:/Downloads/file.txt';
$remote_file_path = '/path/to/file.txt';

$download_result = ftp_get($conn, $local_file_path, $remote_file_path, FTP_BINARY);

if ($download_result) {
    echo '文件下载成功';
} else {
    echo '文件下载失败';
}

Summary:
Through the above steps, we can use PHP to perform file search and file download operations on the FTP server. First, we need to connect to the FTP server and log in. Then, use the function ftp_nlist() to get the file list, and use the function ftp_get() to download the file.

It is worth noting that when using the above functions, please ensure that your PHP environment has enabled the FTP extension and the FTP server has been configured with the corresponding permissions.

I hope this article can help you understand how to search and download files on the FTP server through PHP. If you encounter similar needs in the future web development process, you already have some basic understanding and practical experience.

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