How to use PHP scripts to implement cross-server file transfer on Linux servers

Title: PHP script implementation of cross-server file transfer

1. Introduction

In cross-server file transfer, we usually need to transfer files from One server transmits to another server. This article will introduce how to use PHP scripts to implement cross-server file transfer on Linux servers, and give specific code examples.

2. Preparation work

Before starting to write PHP scripts, we need to ensure that the following environment has been configured on the server:

1. Install PHP: on the Linux server Install PHP and ensure that the PHP version meets the code requirements.
2. Set file directory permissions: Make sure the directory where the file is located has read and write permissions so that the file can be read and written.
3. Configure SSH: Make sure that SSH key authentication has been configured between servers to enable secure file transfer between servers.

3. PHP script writing

The following is a simple PHP script example for cross-server file transfer on a Linux server:

<?php
// 源服务器信息
$sourceServer = array(
    'host' => '源服务器IP地址',
    'port' => 'SSH端口（默认22）',
    'username' => '源服务器用户名',
    'password' => '源服务器密码'
);

// 目标服务器信息
$targetServer = array(
    'host' => '目标服务器IP地址',
    'port' => 'SSH端口（默认22）',
    'username' => '目标服务器用户名',
    'password' => '目标服务器密码'
);

// 源文件路径
$sourceFile = '/path/to/source/file';

// 目标文件路径
$targetFile = '/path/to/target/file';

// 创建SSH连接（源服务器）
$sshSource = ssh2_connect($sourceServer['host'], $sourceServer['port']);
ssh2_auth_password($sshSource, $sourceServer['username'], $sourceServer['password']);

// 创建SSH连接（目标服务器）
$sshTarget = ssh2_connect($targetServer['host'], $targetServer['port']);
ssh2_auth_password($sshTarget, $targetServer['username'], $targetServer['password']);

// 执行文件传输（从源服务器到目标服务器）
if (ssh2_scp_recv($sshSource, $sourceFile, $targetFile)) {
    echo "文件传输成功";
} else {
    echo "文件传输失败";
}

// 关闭SSH连接
ssh2_disconnect($sshSource);
ssh2_disconnect($sshTarget);
?>

In the code , we first defined the source server and target server information (IP address, SSH port, username, password), and then specified the source file path and target file path to be transferred.

Next, we create an SSH connection through the ssh2_connect function and authenticate through the ssh2_auth_password function.

Finally, we use the ssh2_scp_recv function to perform the file transfer operation and transfer the source file to the target server. If the transfer is successful, "File transfer successful" is output; otherwise, "File transfer failed" is output.

4. Summary

Through the above PHP script example, we can implement cross-server file transfer on the Linux server. In actual use, the code can be appropriately modified and optimized according to specific needs to meet your actual needs.

It should be noted that in order to ensure the security of file transfer, it is recommended to use SSH key authentication method for authentication and file transfer operations between servers.

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