backup.php

backup.php

<?php
/*
 * PHP: Recursively Backup Files & Folders to ZIP-File
 * (c) 2012-2014: Marvin Menzerath - http://menzerath.eu
 * contribution: Drew Toddsby
 * contribution: sukum, http://stackoverflow.com/questions/15369291/how-to-ignore-directories-using-recursiveiteratoriterator
*/

// Make sure the script can handle large folders/files
ini_set('max_execution_time', 600);
ini_set('memory_limit','1024M');

// To determine line delimiter for terminal or browser
$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) != 'cli') {
  define('LINE_DELIMITER', "<br />".PHP_EOL);
} else {
  define('LINE_DELIMITER', PHP_EOL);
}

// Start the backup!
zipData('/path/to/folder', '/path/to/backup.zip');
// To exclude folders 'cache' and 'upload'
// zipData('/path/to/folder', '/path/to/backup.zip', array('cache', 'upload'));
echo 'Finished.'.LINE_DELIMITER;

// Here the magic happens :)
function zipData($source, $destination, $exclude_dirs=array()) {
  if ( ! extension_loaded('zip')) {
    echo 'Zip extension not present.'.LINE_DELIMITER;
    return false;
  }
  if ( ! file_exists($source)) {
    echo "Source does not exist: ".$source.LINE_DELIMITER;
    return false;
  }
  
  $zip = new ZipArchive();
  if ( ! $zip->open($destination, ZIPARCHIVE::CREATE)) {
    echo "Could not open destination file. Check permission. - ".$destination.LINE_DELIMITER;
    return false;        
  }
  $source = realpath($source);
  if (is_dir($source)) {
    $iterator = new RecursiveDirectoryIterator($source);
    // skip dot files while iterating 
    $iterator->setFlags(RecursiveDirectoryIterator::SKIP_DOTS);
    // Allow folders to be excluded
    $filtered = new DirFilter($iterator, $exclude_dirs); 
    $files = new RecursiveIteratorIterator($filtered, RecursiveIteratorIterator::SELF_FIRST);
    foreach ($files as $file) {
      $file = realpath($file);
      if (is_dir($file)) {
        //$zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
        // Print directory name if it is in first level
        if ($files->getDepth () == 0) {
          echo $file.LINE_DELIMITER;
          flush();
        }
      } else if (is_file($file)) {
        //$zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
        $zip->addFile($file, str_replace($source . DIRECTORY_SEPARATOR, '', $file));
      }
    }
  } else if (is_file($source)) {
    $zip->addFromString(basename($source), file_get_contents($source));
  }
  return $zip->close();
}

// To exclude directories with given array of names
class DirFilter extends RecursiveFilterIterator {
  protected $exclude;
  public function __construct($iterator, array $exclude) {
    parent::__construct($iterator);
    $this->exclude = $exclude;
  }
  public function accept() {
    return !($this->isDir() && in_array($this->getFilename(), $this->exclude));
  }
  public function getChildren() {
    return new DirFilter($this->getInnerIterator()->getChildren(), $this->exclude);
  }
}