file.class.php

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<?php
class helper_file extends object {

        public function valid(array $file, array $prm = array()) {
                if (empty($file) || (isset($file['size']) && $file['size'] == 0))
                        return true;
                
                $type = $file['type'] != 'application/octet-stream' ? $file['type'] : file::getType($file['name']);
                return (!$this->cfg->maxsize || $file['size'] < $this->cfg->maxsize) && (count($this->cfg->mime) == 0 || in_array($type, $this->cfg->mime));
        }

}