我如何使用php中的数组从ftp服务器下载3个最新文件

Question

如何从ftp服务器下载3个最新文件

我试过使用(array_slice($contents, -3, 3, true)并且在var_dump可以很好地显示内容，这里仅显示了3个最新文件

我需要使用这些名称下载3个文件并将其保存在本地计算机pv_inverter_1和pv_inverter_2和pv_inverter_3

我也可以使用array_slice(???, -3, 3, true)来实现???。

// get contents of the current directory
$contents = ftp_nlist($conn_id, ".");

// output $contents
var_dump (array_slice($contents, -3, 3, true));

$mostRecent = array(
'time' => 0,
'file' => null

);


foreach ($contents as $file) {
// get the last modified time for the file
$time = ftp_mdtm($conn_id, $file);

if ($time > $mostRecent['time']) {
    // this file is the most recent so far
    $mostRecent['time'] = $time;
    $mostRecent['file'] = $file;
    }
}

 if (ftp_get($conn_id, "pv_inverter_1.csv", $mostRecent['file'],FTP_BINARY)) {

     echo "Files Successfully Downloaded\n";
 }    

 else {

    echo "There was a problem\n";
} 

Answer 1

如果要下载服务器在目录列表中返回的最后三个文件：

$files = ftp_nlist($conn_id, ".");

$last_3_files = array_slice($files, -3);

$i = 0;
foreach ($last_3_files as $file)
{
    if (ftp_get($conn_id, "pv_inverter_$i.csv", $file, FTP_BINARY))
    {
        echo "$file downloaded\n";
    }
    else
    {
        echo "There was a problem downloading $file\n";
    }
    $i++;
}

---

但是请注意， “最后”和“最新”是不同的。