PHP function to easily generate a month select box

function.php

<?php
function month_select_box( $field_name = 'month' ) {
    $month_options = '';
    for( $i = 1; $i <= 12; $i++ ) {
        $month_num = str_pad( $i, 2, 0, STR_PAD_LEFT );
        $month_name = date( 'F', mktime( 0, 0, 0, $i + 1, 0, 0, 0 ) );
        $month_options .= '<option value="' . esc_attr( $month_num ) . '">' . $month_name . '</option>';
    }
    return '<select name="' . $field_name . '">' . $month_options . '</select>';
}
?>

Great snippet.

echo "<option $select value='$month_num'> $month_name</option>";