PHP –字符串编码转换（自动识别原编码）

/**
 * 对数据进行编码转换
 * @param array/string $data       数组
 * @param string $output    转换后的编码
 */
function array_iconv($data,  $output = 'utf-8') {
	$encode_arr = array('UTF-8','ASCII','GBK','GB2312','BIG5','JIS','eucjp-win','sjis-win','EUC-JP');
	$encoded = mb_detect_encoding($data, $encode_arr);

	if (!is_array($data)) {
		return mb_convert_encoding($data, $output, $encoded);
	}
	else {
		foreach ($data as $key=>$val) {
			$key = array_iconv($key, $output);
			if(is_array($val)) {
				$data[$key] = array_iconv($val, $output);
			} else {
			$data[$key] = mb_convert_encoding($data, $output, $encoded);
			}
		}
	return $data;
	}
}