/**
 * 解压zip
 *
 * @author 编程之家 jb51.cc jb51.cc
 * @param type $zipfile 要解压的文件
 * @param type $path 解压到该目录
 * @param type $type
 * @return int
 */
function emUnZip($zipfile,$path,$type = 'tpl') {
 if (!class_exists('ZipArchive',FALSE)) {
  return 3;//zip模块问题
 }
 $zip = new ZipArchive();
 if (@$zip->open($zipfile) !== TRUE) {
  return 2;//文件权限问题
 }
 $r = explode('/',$zip->getNameIndex(0),2);
 $dir = isset($r[0]) ? $r[0] . '/' : '';
 switch ($type) {
  case 'tpl':
   $re = $zip->getFromName($dir . 'header.PHP');
   if (false === $re)
    return -2;
   break;
  case 'plugin':
   $plugin_name = substr($dir,-1);
   $re = $zip->getFromName($dir . $plugin_name . '.PHP');
   if (false === $re)
    return -1;
   break;
  case 'backup':
   $sql_name = substr($dir,-1);
   if (getFileSuffix($sql_name) != 'sql')
    return -3;
   break;
 }
 if (true === @$zip->extractTo($path)) {
  $zip->close();
  return 0;
 } else {
  return 1;//文件权限问题
 }
}