How to Print Hexadecimal Numbers in PHP or Java

Question

I need to print some data (a little bit strange formatted). I was writing it in PHP with if ($num%10==9) but it was impossible for me to get correct output.

So take

Answer 1

01
02
03
04
05
06
07
08
09
0a
0b
0c
0d
0e
0f
10
11
12
13
14
15
16
17
18
19
1a
1b
1c
1d
1e
1f
20
21
22
23
24