<?php
namespace ZhiCms\ext;
//xml解析成数组
class Xml
{
	public static function decode($xml)
	{
		$values = array();
		$index  = array();
		$array  = array();
		$parser = xml_parser_create('utf-8');
		xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
		xml_parse_into_struct($parser, $xml, $values, $index);
		xml_parser_free($parser);
		$i = 0;
		$name = $values[$i]['tag'];
		$array[$name] = isset($values[$i]['attributes']) ? $values[$i]['attributes'] : '';
		$array[$name] = self::_struct_to_array($values, $i);
		return $array;
	}
	
	private static function _struct_to_array($values, &$i)
	{
		$child = array();
		if (isset($values[$i]['value'])) 
		array_push($child, $values[$i]['value']);
		
		while ($i++ < count($values))
		 {
			switch ($values[$i]['type']) 
			{
				case 'cdata':
					array_push($child, $values[$i]['value']);
					break;
				
				case 'complete':
					$name = $values[$i]['tag'];
					if(!empty($name))
					{
						$child[$name]= ($values[$i]['value'])?($values[$i]['value']):'';
						if(isset($values[$i]['attributes'])) 
						{                   
							$child[$name] = $values[$i]['attributes'];
						}
					}   
				break;
				
				case 'open':
					$name = $values[$i]['tag'];
					$size = isset($child[$name]) ? sizeof($child[$name]) : 0;
					$child[$name][$size] = self::_struct_to_array($values, $i);
					break;
				
				case 'close':
					return $child;
					break;
			}
		}
		return $child;
	}
}