将query_string转为数组

query_string_to_array.php

/**
 * 将查询字符串解析为数组
 * @param  string
 * @return array
 */
private static function _parseQueryString($query = '')
{
	$res = array();
	$pieces = explode('&', trim($query));
	foreach ($pieces as $piece)   // $piece likes 'serial=123'
	{
		$kv = explode('=', $piece);
		if (count($kv) != 2 || $kv[0] == '')
		{
			continue;
		}
		$res[$kv[0]] = $kv[1];
	}
	return $res;
}