elegant full address search on UTF-8

gistfile1.txt

  function fullSearch($array){
    $limit=intval($array['limit'])==0?100:intval($array['limit']);

    $address=$array['address'];
    // process for elegant searching - by `surplus` flrngel
    $na=array();
    $split= explode(" ",$address);
    $newstr=null;
    foreach($split as $key=>$val){
      preg_match_all('/./u',$val,$hangul_cut);
      $hangul_cut=$hangul_cut[0];
      $newstr.=$val;

      if( in_array($hangul_cut[count($hangul_cut)-1],array('시','도','읍','면','동','군','구')) ){
        $na[]=$newstr;
        $newstr=null;
      }
    }
    if( $newstr ) $na[]=$newstr;
    $address=join($na," ");
    // elegant searching end

    $sql="select * from Postcode where full like '%$address%' limit $limit";
    $res=$this->db->query($sql)->fetch_all_objects();
    return $res;
  }