PHP RecursiveIteratorIterator empty when passed a RecursiveRegexIterator - php

Question

A snapshot of Explorer class can be see below -
class Explorer
{
//....
public function getIterator()
{
//$iterator = new FileSearchIterator($this->baseDir, $this->pattern, $this->buildFlag());
if ($this->iterator) {
return $this->iterator;
}
$iterator = new RecursiveDirectoryIterator($this->baseDir, $this->buildFlag());
if ($this->ignoreVcsFiles) {
$this->ignore = array_merge($this->ignore, static::$vcsFiles);
}
if (!empty($this->ignore)) {
$iterator = new ExcludeFilter($iterator, $this->ignore);
}
if ($this->searchFor === static::SEARCH_FILES) {
$iterator = new FilenameRegexFilter($iterator, $this->pattern);
} else {
$iterator = new DirectoryRegexFilter($iterator, $this->pattern);
}
$this->iterator = new RecursiveIteratorIterator($iterator);
return $this->iterator;
}
//......
}
In Tests the given directory contains a single php file. But when filtering for only ****.php*** files using new FilenameRegexFilter(...) and then passing it through RecursiveIteratorIterator results in an empty RecursiveIteratorIterator instance.
You can see the rest of the filter classes (used above) below -
class ExcludeFilter extends \RecursiveFilterIterator
{
protected $iterator;
protected $ignore = [];
/**
* #inheritDoc
*/
public function __construct(\RecursiveIterator $iterator, array $ignore)
{
$this->iterator = $iterator;
$this->ignore = $ignore;
parent::__construct($iterator);
}
public function accept()
{
return !in_array($this->current()->getFilename(), $this->ignore, true);
}
public function getChildren()
{
$children = parent::getChildren();
$children->ignore = $this->ignore;
return $children;
}
}
class FilenameRegexFilter extends RecursiveRegexFilter
{
/**
* #inheritdoc
*/
public function accept()
{
return ($this->current()->isFile() && preg_match($this->regex, $this->current()->getFilename()));
}
/**
* #return \RecursiveRegexIterator
*/
public function getChildren()
{
$children = parent::getChildren();
$children->regex = $this->regex;
return $children;
}
}
abstract class RecursiveRegexFilter extends \RecursiveRegexIterator
{
protected $regex;
protected $iterator;
/**
* RegexFilter constructor.
* #param \RecursiveIterator $iterator
* #param string $regex
*/
public function __construct(\RecursiveIterator $iterator, $regex)
{
$this->iterator = $iterator;
$this->regex = $this->toRegex($regex);
parent::__construct($iterator, $this->regex);
}
/**
* #return \RecursiveRegexIterator
*/
public function getChildren()
{
$children = new static($this->iterator->getChildren(), $this->regex);
return $children;
}
/**
* #param $pattern
* #param array $options
* #return string
*/
public function toRegex($pattern, $options = [])
{
$pattern = str_replace(array('\*', '\?'), array('.*','.'), preg_quote($pattern));
$pattern = '/^' . $pattern . '$/';
if (!empty($options)) {
$pattern .= implode('', $options);
}
return $pattern;
}
}
class DirectoryRegexFilter extends RecursiveRegexFilter
{
public function accept()
{
return ($this->current()->isDir() || preg_match($this->regex, $this->current()->getFilename()));
}
}
I don't get where I'm going wrong. Can someone please point me in the right direction.
EDIT: To simplify my Question largely is how do I use RecursiveDirectoryIterator with RecursiveFilterIterator