ExcludeFilter.php

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<?php
namespace Magento\Framework\Filesystem\Filter;

class ExcludeFilter extends \FilterIterator
{
    protected $_filters;

    public function __construct(\Iterator $iterator, array $filters)
    {
        parent::__construct($iterator);
        $this->_filters = $filters;
    }

    public function accept()
    {
        $current = str_replace('\\', '/', $this->current()->__toString());
        $currentFilename = str_replace('\\', '/', $this->current()->getFilename());

        if ($currentFilename == '.' || $currentFilename == '..') {
            return false;
        }

        foreach ($this->_filters as $filter) {
            $filter = str_replace('\\', '/', $filter);
            if (false !== strpos($current, $filter)) {
                return false;
            }
        }

        return true;
    }
}