protected function scanFolder($folder, &$position, $forFolders = true, $threshold_key = 'dir', $threshold_default = 50)
{
$registry = AEFactory::getConfiguration();
// Initialize variables
$arr = array();
$false = false;
if (!is_dir($folder) && !is_dir($folder . '/')) {
return $false;
}
try {
$di = new DirectoryIterator($folder);
} catch (Exception $e) {
$this->setWarning('Unreadable directory ' . $folder);
return $false;
}
if (!$di->valid()) {
$this->setWarning('Unreadable directory ' . $folder);
return $false;
}
if (!empty($position)) {
$di->seek($position);
if ($di->key() != $position) {
$position = null;
return $arr;
}
}
$counter = 0;
$maxCounter = $registry->get("engine.scan.large.{$threshold_key}_threshold", $threshold_default);
while ($di->valid()) {
if ($di->isDot()) {
$di->next();
continue;
}
if ($di->isDir() != $forFolders) {
$di->next();
continue;
}
$ds = $folder == '' || $folder == '/' || @substr($folder, -1) == '/' || @substr($folder, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
$dir = $folder . $ds . $di->getFilename();
$data = _AKEEBA_IS_WINDOWS ? AEUtilFilesystem::TranslateWinPath($dir) : $dir;
if ($data) {
$counter++;
$arr[] = $data;
}
if ($counter == $maxCounter) {
break;
} else {
$di->next();
}
}
// Determine the new value for the position
$di->next();
if ($di->valid()) {
$position = $di->key() - 1;
} else {
$position = null;
}
return $arr;
}
private function _filestackProcessDir($dir)
{
$Iterator = new \DirectoryIterator($dir);
if ($this->_filestackKey > 0) {
$Iterator->seek($this->_filestackKey);
}
while ($Iterator->valid()) {
// timeout check:
if ($this->intervalLimitIsReached() === true) {
$this->_Dirstack->save();
$this->_Filestack->save();
$this->setMessage('Filestack creation: ' . $this->_filesInStack . ' files processed.');
return false;
}
$this->_filestackKey = $Iterator->key();
$this->Storage->set('filestackKey', $this->_filestackKey, 'filecheck');
// skip dots:
if ($Iterator->isDot()) {
$Iterator->next();
continue;
}
// if is directory save to database for later processing:
$currentPath = $Iterator->getPathname();
if ($Iterator->isDir()) {
$this->_Dirstack->addPath($currentPath);
$Iterator->next();
continue;
}
// filesize check:
$filesize = $Iterator->getSize();
if (empty($filesize) || $filesize > $this->sizeFilter) {
$Iterator->next();
continue;
}
// filetype check:
if ($this->_extensionCheck === true) {
$fileExtension = $Iterator->getExtension();
if (empty($fileExtension) || !isset($this->_allowedExtensions[$fileExtension])) {
$Iterator->next();
continue;
}
}
// add file to stack:
$this->_Filestack->addPath($currentPath);
// create hash (if not yet done):
if ($this->_createFilehashDb === true) {
$pathhash = sha1($currentPath);
$filehash = sha1_file($currentPath);
$this->Database->setQuery("INSERT IGNORE INTO #__wm_filehashes (pathhash, filehash, mode) VALUES(" . $this->Database->q($pathhash) . "," . $this->Database->q($filehash) . ", " . $this->Database->q($this->runMode) . ")")->execute();
}
$this->_filesInStack++;
$this->Storage->set('filesInStack', $this->_filesInStack, 'filecheck');
$Iterator->next();
}
unset($Iterator);
// current dir completed -> delete from stack:
$this->_Dirstack->save();
$this->_Dirstack->clear();
$this->_Filestack->save();
$this->_Filestack->clear();
$this->Database->setQuery("DELETE FROM #__wm_dirstack WHERE path = " . $this->Database->q($dir) . "AND mode = " . $this->Database->q($this->runMode))->execute();
$this->_filestackKey = 0;
// select next dir from stack:
$this->Database->setQuery("SELECT path FROM #__wm_dirstack WHERE mode = " . $this->Database->q($this->runMode) . " LIMIT 1")->execute();
$row = $this->Database->getRow();
if (empty($row)) {
return true;
}
$this->_filestackPath = $row->path;
$this->Storage->set('filestackPath', $this->_filestackPath, 'filecheck');
return $this->_filestackProcessDir($row->path);
}
/**
* Get list of files for file browser
* @param int $seek
* @param int $limit
* @param string $filter
* @param bool $secure use secure folder instead of repository root
* @return array
*/
public function getAvailableFiles($seek, $limit, $filter, $filterExtensions, $secure = false, $subdir = null)
{
$answer = array();
if ($subdir && substr($subdir, -1) != '/') {
$subdir .= '/';
}
$repositoryDir = $this->getPath($secure, $subdir);
$iterator = new \DirectoryIterator($repositoryDir);
$iterator->seek($seek);
while ($iterator->valid() && count($answer) < $limit) {
if ($iterator->isFile()) {
$fileData = $this->getFileData($iterator->getFilename(), $secure, $subdir);
$append = null;
switch ($filter) {
case 'image':
if (in_array($fileData['ext'], $this->supportedImageExtensions)) {
$append = $fileData;
}
break;
default:
$append = $fileData;
break;
}
if ($filterExtensions && !in_array($fileData['ext'], $filterExtensions)) {
$append = null;
}
if ($append) {
$answer[] = $append;
}
}
$iterator->next();
}
return $answer;
}
<?php
$di = new DirectoryIterator(__DIR__);
$di->seek(2);
$n = 0;
while ($di->valid()) {
$n++;
$di->next();
}
echo "With seek(2) we get {$n}\n";
$di->seek(0);
$m = 0;
while ($di->valid()) {
$m++;
$di->next();
}
echo "With seek(0) we get {$m}\n";
$o = 0;
$di->rewind();
while ($di->valid()) {
$o++;
$di->next();
}
echo "Without seek we get {$o}\n";
$p = 0;
$di->seek($o + 1);
while ($di->valid()) {
$p++;
$di->next();
}
var_dump($n !== $m, $m === $o, $p === 0);
<?php mkdir(__DIR__ . DIRECTORY_SEPARATOR . 'tmp'); touch(__DIR__ . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR . 'a'); touch(__DIR__ . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR . 'b'); $d = new DirectoryIterator(__DIR__ . DIRECTORY_SEPARATOR . 'tmp'); $d->seek(0); $path0 = $d->current()->getPathname(); $d->seek(1); $path1 = $d->current()->getPathname(); $d->seek(2); $path2 = $d->current()->getPathname(); $d->seek(0); var_dump($path0 === $d->current()->getPathname()); $d->seek(1); var_dump($path1 === $d->current()->getPathname()); $d->seek(2); var_dump($path2 === $d->current()->getPathname()); $d->seek(0); var_dump($path0 === $d->current()->getPathname());
<?php
$dir = new DirectoryIterator('./images');
session_start();
if (!isset($_SESSION['imageid'])) {
$_SESSION['imageid'] = 0;
}
$dir->seek($_SESSION['imageid']);
do {
$dir->next();
//loop back to 0
if (!$dir->valid()) {
$dir->seek(0);
}
} while (!$dir->isFile() || !$dir->valid() || !exif_imagetype($dir->getPathname()));
//it's not an image
$_SESSION['imageid'] = $dir->key();
//echo $dir->key();
echo './images/' . $dir->getFilename();
//imagejpeg('./images/'.$fileinfo-getFilename(), NULL,100);
/**
* Overridden to not crash PHP 5.2, because DirectoryIterator::seek was added in 5.3.
*
* @link http://lxr.php.net/xref/PHP_5_3/ext/spl/spl_directory.c#807
*/
public function seek($position)
{
if (is_callable(array('parent', 'seek'))) {
parent::seek($position);
return;
}
if ($this->key() > $position) {
$this->rewind();
}
while ($this->key() < $position) {
if (!$this->valid()) {
return;
}
$this->next();
}
}
<?php $dit = new DirectoryIterator(__DIR__); $dit->seek(5); echo $dit->key(), PHP_EOL; $dit->seek(4); echo $dit->key(), PHP_EOL;
