"For" Question

[alirezaok]

hi

 for ($i = 01; $i <= 31; $i++) {
echo $i;
		}

it echo :
1
2
3
...
31

but i want to echo:
01
02
03
...
31

what do I do?

[NogDog]

for ($i = 1; $i <= 31; $i++) {
   printf('%02d', $i);
}

[alirezaok]

if i want to store in variable what do i do?

for ($i = 01; $i <= 31; $i++) { 
$s.=$i; 
        }

$s has 123456...31

i want to $s has 010203040506...31

[NogDog]

Use sprintf() instead of printf() and assign it to your variable:

$s .= sprintf('%02d', $i);