从当前文件夹中删除所有旧文件 backup.tar 并使用 glob 将最后 3 个 backup.tar 保留在 php 中

Question

我创建了几个脚本来备份我的网站，脚本分为两个文件：

backup.php（执行备份然后重定向到 index.php）

index.php（调用文件 backup.php 并在显示备份后）

我想配置一种方法来保留最后 X（3、4 等）个备份，同时删除最旧的备份。

我正在使用 glob、filemtime、array_multisort(array_map('filemtime', $backups)、SORT_NUMERIC、SORT_DESC、$backups)、取消链接。

所以第一个文件是最新的。

备份.php：

  $root = realpath($_SERVER['DOCUMENT_ROOT']);
  $sdir = realpath($_SERVER['DOCUMENT_ROOT'] . dirname($_SERVER['PHP_SELF']));
  $name = "BackUp_" . date("[m-d-Y][H-i-s]") . ".tar";
  $skip = "BackUp*.tar";
  if (strtoupper(substr(PHP_OS,0,3) == 'WIN')) {
    $root = str_replace("\\", "/", $root);
    $sdir = str_replace("\\", "/", $sdir);
  }
  if (function_exists('exec')) {
    @exec("tar -cf $sdir/$name $exclude --exclude='$sdir/$skip' --exclude='$root/.htaccess' $root/* ");
    if (file_exists("$root/.htaccess")) {
      @exec("tar -rf $sdir/$name $root/.htaccess ");
    }
  }
  $protocol = check_protocol() ? 'https://' : 'http://';
  $absolute = $protocol . $_SERVER['HTTP_HOST'] . rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
  header("Location: $absolute/index.php");

index.php:

  $sdir = $_SERVER['DOCUMENT_ROOT'] . dirname($_SERVER['PHP_SELF']) . "/";
  $backups = glob($sdir . "BackUp*.tar");
  array_multisort(array_map('filemtime', $backups), SORT_NUMERIC, SORT_DESC, $backups);
  $count_backups = 0;
  if (file_exists("dat/backdata.dat")) {
    $number_of_backups = file_get_contents("dat/backdata.dat");
    $number_of_backups = trim(htmlentities($number_of_backups, ENT_QUOTES | ENT_HTML401, 'UTF-8'));
  } else {
    $number_of_backups = 0;
  }
  foreach ($backups as $backup) {
    $archive = basename($backup);
    ++$count_backups;
    echo "    <span class=\"download\"><a href=\"$archive\" class=\"download-me tooltip\" onclick=\"return confirm('Download the backup " . "$archive?');\"><span class=\"tip\">You can download the backup " . "$archive</span>$archive</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"delete\"><a class=\"delete-me tooltip\" href=\"index.php?delete=$archive\" onclick=\"return confirm('Are you sure to delete the backup " . "$archive?');\"><span class=\"tip\">You can delete the backup " . "$archive</span>Delete</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"filesize\"><span class=\"filesize-me\">" . GetRealSize($archive) . "</span></span><br>" . PHP_EOL;
  }
  if ($count_backups == 0) {
    echo "    <span class=\"warn\">Press BackUp and wait until the backup is done!</span><br>" . PHP_EOL;
  }

我有一个名为“backdata.dat”的文件，其中只包含数字 (int)。可以编辑此文件以配置要保留的备份数量。

我想以这种方式使用 backdata.dat：

backdata.dat 包含 0 对可能的备份数量没有限制

backdata.dat 包含任何其他大于零的数字，直到 100 用于删除其他更旧的数字并保留前 3、4、10、20、50 等...

除了 index.php 之外的脚本工作正常，因为我尝试过但无法解决问题...

我试过了：

index.php

  $sdir = $_SERVER['DOCUMENT_ROOT'] . dirname($_SERVER['PHP_SELF']) . "/";
  $backups = glob($sdir . "BackUp*.tar");
  array_multisort(array_map('filemtime', $backups), SORT_NUMERIC, SORT_DESC, $backups);
  $count_backups = 0;
  if (file_exists("dat/backdata.dat")) {
    $number_of_backups = file_get_contents("dat/backdata.dat");
    $number_of_backups = trim(htmlentities($number_of_backups, ENT_QUOTES | ENT_HTML401, 'UTF-8'));
  } else {
    $number_of_backups = 0;
  }
  foreach ($backups as $backup) {
    $archive = basename($backup);
    ++$count_backups;
    if (($count_backups > $number_of_backups) && ($number_of_backups > 0)) {
      unlink($archive);
      echo "    <span class=\"download\"><a href=\"$archive\" class=\"download-me tooltip\" onclick=\"return confirm('Download the backup " . "$archive?');\"><span class=\"tip\">You can download the backup " . "$archive</span>$archive</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"delete\"><a class=\"delete-me tooltip\" href=\"index.php?delete=$archive\" onclick=\"return confirm('Are you sure to delete the backup " . "$archive?');\"><span class=\"tip\">You can delete the backup " . "$archive</span>Delete</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"filesize\"><span class=\"filesize-me\">" . GetRealSize($archive) . "</span></span><br>" . PHP_EOL;
    }
  }
  if ($count_backups == 0) {
    echo "    <span class=\"warn\">Press BackUp and wait until the backup is done!</span><br>" . PHP_EOL;
  }

此代码无法正常工作。如何解决？谢谢。亚历山德罗

Answer 1

解决了！这是一个错误，我找到的正确方法在这里：

  foreach ($backups as $backup) {
    $archive = basename($backup);
    ++$count_backups;
    if (($count_backups > $number_of_backups) && ($number_of_backups > 0)) {
      unlink($archive);
    } else {
      echo "    <span class=\"download\"><a href=\"$archive\" class=\"download-me tooltip\" onclick=\"return confirm('$strg_10 " . "$archive?');\"><span class=\"tip\">$strg_10 " . "$archive</span>$archive</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"delete\"><a class=\"delete-me tooltip\" href=\"index.php?delete=$archive\" onclick=\"return confirm('$strg_11 " . "$archive?');\"><span class=\"tip\">$strg_11 " . "$archive</span>$strg_11</a></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"filesize\"><span class=\"filesize-me\">" . GetRealSize($archive) . "</span></span><br>" . PHP_EOL;
    }
  }

还是谢谢。