Why is the strftime function not working correctly?

Question

PHP

Why function:

echo (strftime('%e', strtotime('first day of next month')));

Returns one (with a space before it) ?
Like this:

echo (strftime('%m', strtotime('first day of next month')))

Everything works correctly, but the month number is returned in this format: 01, 02 .., but you need 1.2 ..

Answer 1

%e - DAY of the month, with a LEADING SPACE if it is a single digit.
%m - TWO DIGITAL serial number of the MONTH
php.net/strftime