if ($monthstrt == 'Jan'): $mnthstrtnmb="01";
elseif ($monthstrt == 'Feb'): $mnthstrtnmb="02";
elseif ($monthstrt == 'March'): $mnthstrtnmb="03";
elseif ($monthstrt == 'Apr'): $mnthstrtnmb="04";
elseif ($monthstrt == 'May'): $mnthstrtnmb="05";
elseif ($monthstrt == 'Jun'): $mnthstrtnmb="06";
elseif ($monthstrt == 'Jul'): $mnthstrtnmb="07";
elseif ($monthstrt == 'Aug'): $mnthstrtnmb="08";
elseif ($monthstrt == 'Sep'): $mnthstrtnmb="09";
elseif ($monthstrt == 'Oct'): $mnthstrtnmb="10";
elseif ($monthstrt == 'Nov'): $mnthstrtnmb="11";
else: $mnthstrtnmb="12";
endif;

if ($monthend == 'Jan'): $mnthendnmb="01";
elseif ($monthend == 'Feb'): $mnthendnmb="02";
elseif ($monthend == 'March'): $mnthendnmb="03";
elseif ($monthend == 'Apr'): $mnthendnmb="04";
elseif ($monthend == 'May'): $mnthendnmb="05";
elseif ($monthend == 'Jun'): $mnthendnmb="06";
elseif ($monthend == 'Jul'): $mnthendnmb="07";
elseif ($monthend == 'Aug'): $mnthendnmb="08";
elseif ($monthend == 'Sep'): $mnthendnmb="09";
elseif ($monthend == 'Oct'): $mnthendnmb="10";
elseif ($monthend == 'Nov'): $mnthendnmb="11";
else: $mnthendnmb="12";
endif;