PHP - 使用FTP合并文件(PHP - Merging files with FTP)

 所以，我正在尝试使用FTP将文件从本地服务器复制到远程服务器。 问题是，我需要以大块的方式做到这一点。 
 
 到目前为止，根据我的研究，通过在我的本地服务器上创建两个文件来看起来可能是最简单的：要复制的文件和一个保存当前块的小型临时文件。 然后，我应该简单地将该块与远程文件合并。 
 
 问题是，我在添加文件时遇到问题。 我无法弄清楚ftp://协议是如何工作的，我无法找到有关如何使用cURL的全面解释。 我发现的最接近的是这个 ，但我无法让它发挥作用。 
 
 以下是我到目前为止所写的内容。 我已经对它进行了评论，因此您可以浏览它以获得想法，并查看我遇到的问题 - 代码并不复杂。 你有什么建议我做的？ 如何使用FTP将本地服务器上的文件附加到远程服务器上的文件中？ 
 
<?php

// FTP credentials
$server = HIDDEN;
$username = HIDDEN;
$password = HIDDEN;

// Connect to FTP
$connection = ftp_connect($server) or die("Failed to connect to <b>$server</b>.");

// Login to FTP
if (!@ftp_login($connection, $username, $password))
{
    echo "Failed to login to <b>$server</b> as <b>$username</b>.";
}

// Destination file (where the copied file should go)
$destination = 'final.txt';

// The file on my server that we're copying (in chunks) to $destination.
$read = 'readme.txt';

// Current chunk of $read.
$temp = 'temp.tmp';

// If the file we're trying to copy exists...
if (file_exists($read))
{
    // Set a chunk size (this is tiny, but I'm testing
    // with tiny files just to make sure it works)
    $chunk_size = 4;

    // For reading through the file we want to copy to the FTP server.
    $read_handle = fopen($read, 'r');

    // For writing the chunk to its own file.
    $temp_handle = fopen($temp, 'w+');

    // Loop through $read until we reach the end of the file.
    while (!feof($read_handle))
    {
        // Read a chunk of the file we're copying.
        $chunk = fread($read_handle, $chunk_size);

        // Write that chunk to its own file.
        fwrite($temp_handle, $chunk);

        ////////////////////////////////////////////
        ////                                    ////
        ////       NOW WHAT?? HOW DO I          ////
        ////       WRITE / APPEND THAT          ////
        ////       CHUNK TO $destination?       ////
        ////                                    ////
        ////////////////////////////////////////////
    }
}

fclose($read_handle);
fclose($temp_handle);
ftp_close($ftp_connect);
?>

So, I'm trying to copy a file from my local server to a remote server with FTP. The problem is, I need to do this in chunks.
 
Thus far, based on my research, it looks like it will probably be easiest to do this by making two files on my local server: the file to be copied, and a small, temporary file that holds the current chunk. Then, I should simply merge that chunk with the remote file.
 
The problem is, I'm having trouble appending files. I can't figure out how the ftp:// protocol works, and I can't find a comprehensive explanation on how to do it with cURL. The closest I've found is this, but I couldn't get it working.
 
Below is what I've written up so far. I've commented it so you can just skim through it to get the idea, and see where I'm stuck--the code isn't complicated. What do you recommend I do? How do I append a file on my local server a file on a remote server with FTP?
 
<?php

// FTP credentials
$server = HIDDEN;
$username = HIDDEN;
$password = HIDDEN;

// Connect to FTP
$connection = ftp_connect($server) or die("Failed to connect to <b>$server</b>.");

// Login to FTP
if (!@ftp_login($connection, $username, $password))
{
    echo "Failed to login to <b>$server</b> as <b>$username</b>.";
}

// Destination file (where the copied file should go)
$destination = 'final.txt';

// The file on my server that we're copying (in chunks) to $destination.
$read = 'readme.txt';

// Current chunk of $read.
$temp = 'temp.tmp';

// If the file we're trying to copy exists...
if (file_exists($read))
{
    // Set a chunk size (this is tiny, but I'm testing
    // with tiny files just to make sure it works)
    $chunk_size = 4;

    // For reading through the file we want to copy to the FTP server.
    $read_handle = fopen($read, 'r');

    // For writing the chunk to its own file.
    $temp_handle = fopen($temp, 'w+');

    // Loop through $read until we reach the end of the file.
    while (!feof($read_handle))
    {
        // Read a chunk of the file we're copying.
        $chunk = fread($read_handle, $chunk_size);

        // Write that chunk to its own file.
        fwrite($temp_handle, $chunk);

        ////////////////////////////////////////////
        ////                                    ////
        ////       NOW WHAT?? HOW DO I          ////
        ////       WRITE / APPEND THAT          ////
        ////       CHUNK TO $destination?       ////
        ////                                    ////
        ////////////////////////////////////////////
    }
}

fclose($read_handle);
fclose($temp_handle);
ftp_close($ftp_connect);
?>

原文：https://stackoverflow.com/questions/11267057