<?
$data = "<para><note>simple note</note><cd><dd><ee>ff</ee></dd></cd><ddd></ddd></para>";
$parser = xml_parser_create();
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
xml_parse_into_struct($parser, $data, $values, $tags);
xml_parser_free($parser);

$arr = array();
$p = array();
foreach ($values as $k=>$v){
    if($v[type] == 'open'){
        $p[] = $v[tag];
    }elseif($v[type] == 'complete'){
        switch (count($p)){
            case 1: $arr[$p[0]][$v[tag]] = $v[value];break;
            case 2: $arr[$p[0]][$p[1]][$v[tag]] = $v[value];break;
            case 3: $arr[$p[0]][$p[1]][$p[2]][$v[tag]] = $v[value];break;
            case 4: $arr[$p[0]][$p[1]][$p[2]][$p[3]][$v[tag]] = $v[value];break;
            case 5: $arr[$p[0]][$p[1]][$p[2]][$p[3]][$p[4]][$v[tag]] = $v[value];break;
        }
        #print_r($arr);echo "<br /><br />";
    }elseif($v[type] == 'close'){
        unset($p[count($p)-1]);
    }
}
print_r($arr);echo "<br /><br />";
?>
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