How can I start a for-loop with 01 instead of 1?

Question

How do I start a for-loop with 01 as opposed to 1? I\'ve tried the below, but it doesn\'t seem to work.

for ($i = 01; $i <= 12;          


        

Answer 1

You can't really start an integer at 01, you will need to pad the value, probably using str_pad to prefix leading elements to a string:

$value = $i;
if ($i < 10) {
    $value = str_pad($i, 2, "0", STR_PAD_LEFT);
}

Note that for different unit types you will obviously need to alter the desired pad_length.