function burc($tarih){


    $burclar = array();





    $burclar["Balık"]   = mktime(0,0,0,1,21,1970);


    $burclar["Kova"]    = mktime(0,0,0,2,20,1970);


    $burclar["Koç"]     = mktime(0,0,0,3,21,1970);


    $burclar["Boğa"]    = mktime(0,0,0,4,21,1970);


    $burclar["İkizler"] = mktime(0,0,0,5,22,1970);


    $burclar["Yengeç"]  = mktime(0,0,0,6,22,1970);


    $burclar["Aslan"]   = mktime(0,0,0,7,24,1970);


    $burclar["Başak"]   = mktime(0,0,0,8,24,1970);


    $burclar["Terazi"]  = mktime(0,0,0,9,24,1970);


    $burclar["Akrep"]   = mktime(0,0,0,10,24,1970);


    $burclar["Yay"]     = mktime(0,0,0,11,22,1970);


    $burclar["Oğlak"]   = mktime(0,0,0,12,23,1970);





    $gtarih = explode("-",$tarih);


    $tarih  = mktime(0,0,0,$gtarih[1],$gtarih[0],1970);


    $isaretli_burc = $burclar["Oğlak"];


    $c = 0;


    foreach($burclar as $burcname=>$burc_tarih) {


        if($tarih < $burc_tarih || $tarih==$burc_tarih) {


           $isaretli_burc = $prevburc;


           break;


        }


        $prevburc = $burcname;


        $c++;


    }    


    return $isaretli_burc;


}

echo burc("27-10");