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    function get_xz($birthday) {
    
        $arr_day = explode('-', $birthday);
        $month = $arr_day[1];
        $day = $arr_day[2];
        
        if($month < 1 or $month > 12 or $day < 1 or $day > 31) return false; 
    
        $xz_array = array(
            array("20" => "水瓶座"),
            array("19" => "双鱼座"),
            array("21" => "白羊座"),
            array("20" => "金牛座"),
            array("21" => "双子座"),
            array("22" => "巨蟹座"),
            array("23" => "狮子座"),
            array("23" => "处女座"),
            array("23" => "天秤座"),
            array("24" => "天蝎座"),
            array("22"=>"射手座"),
            array("22"=>"摩羯座")
        );
        foreach ($xz_array[(int)$month-1] as $xz_key => $xz_name);
        if ($day < $xz_key) :
            foreach ($xz_array[($month-2 < 0)?$month = 11:$month -= 2] as $xz_key => $xz_name);
        endif;
        return $xz_name;
    }