再起的にファイルのパスを取得

//再起的にファイルのパスを取得
function lfGetFilePathRecursive($parentPath, $rootPath=NULL, $image_only=false){

    $arrResult = array();
    $parentPath = preg_replace('/\/$/', '', $parentPath);
    $rootPath = preg_replace('/\/$/', '', $rootPath);

    if(is_dir($rootPath.$parentPath)){
        $arrChilds = scandir($rootPath.$parentPath);
        foreach($arrChilds as $child){
            if(preg_match('/^[^.].+/', $child)){
                $childPath = $parentPath.'/'.$child;
                if(is_dir($rootPath.$childPath)){
                    $arrResult = array_merge($arrResult, $this->lfGetFilePathRecursive($childPath, $rootPath, $image_only));
                }else{
                    if($image_only){
                        switch(exif_imagetype($rootPath.$childPath)){
                            case IMAGETYPE_GIF:
                            case IMAGETYPE_JPEG:
                            case IMAGETYPE_PNG:
                            case IMAGETYPE_BMP:
                                break;
                            default:
                                continue 2;
                        }
                    }
                    $arrResult[] = $childPath;
                }
            }
        }
    }
    return $arrResult;
}