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<?php
abstract class wfDirectoryIterator {
abstract public function file($file);
/**
* @var string
*/
private $directory;
/**
* @var int
*/
private $directory_limit;
private $directories_entered = array();
private $directories_processed = array();
/**
* @var callback
*/
private $callback;
/**
* @var int
*/
private $max_iterations;
private $iterations;
/**
* @param string $directory
* @param int $max_files_per_directory
* @param int $max_iterations
*/
public function __construct($directory = ABSPATH, $max_files_per_directory = 20000, $max_iterations = 1000000) {
$this->directory = $directory;
$this->directory_limit = $max_files_per_directory;
$this->max_iterations = $max_iterations;
}
public function run() {
$this->iterations = 0;
$this->scan($this->directory);
}
protected function scan($dir) {
$dir = rtrim($dir, DIRECTORY_SEPARATOR);
$handle = opendir($dir);
$file_count = 0;
while ($file = readdir($handle)) {
if ($file == '.' || $file == '..') {
continue;
}
$file_path = $dir . '/' . $file;
$real_path = realpath($file_path);
if (isset($this->directories_processed[$real_path]) || isset($this->directories_entered[$real_path])) { //Already processed or being processed, possibly a recursive symlink
continue;
}
else if (is_dir($file_path)) {
$this->directories_entered[$real_path] = 1;
if ($this->scan($file_path) === false) {
closedir($handle);
return false;
}
$this->directories_processed[$real_path] = 1;
unset($this->directories_entered[$real_path]);
}
else {
if ($this->file($file_path) === false) {
closedir($handle);
return false;
}
}
if (++$file_count >= $this->directory_limit) {
break;
}
if (++$this->iterations >= $this->max_iterations) {
closedir($handle);
return false;
}
}
closedir($handle);
return true;
}
}