دالة اظهار التاريخ الهجري php

//دالة التاريخ الهجري
 function Hijri($GetDateFormat)
    {
        $TDays=round(strtotime($GetDateFormat)/(60*60*24));
        $HYear=round($TDays/354.37419);
        $Remain=$TDays-($HYear*354.37419);
        $HMonths=round($Remain/29.531182);
        $HDays=$Remain-($HMonths*29.531182);
        $HYear=$HYear+1389;
        $HMonths=$HMonths+10;
        $HDays=$HDays+23;
            if ($HDays>29.531188 and round($HDays)!=30)
            {
            $HMonths=$HMonths+1;
            $HDays=Round($HDays-29.531182);
            }
            else
            {
            $HDays=Round($HDays);
            }

            if ($HMonths>12){$HMonths=$HMonths-12;$HYear=$HYear+1;}

    $ResultDate="$HDays-$HMonths-$HYear";
    $ResultDate="$ResultDate"."هـ";

    return $ResultDate;
    }// طريقة الاستدعاءecho Hijri($GetDateFormat);