need help after decoding

[lilgezuz]

So I'm using the below code to decode some strings.

$str = '0jc8P2NhbC9HXxtUGltTWDE5L2FjaC8wL2UzAAAAAVBQUP26AZg=';
$str1 = base64_decode($str);
echo nl2br(htmlspecialchars($str1, ENT_QUOTES));

After decoding I get this as my result

7<?cal/G_T[SX19/ach/0/e3PPP

Now how do I go about getting just this section /ach/0/e3 of the above result?  I need to take just that section of the string and insert it into a datebase.  But I can't figure out how to pull just that section out?

 

Thanks in advance

[lilgezuz]

I got it the result I needed by using this, not sure if its the best way but it works

$str2 = substr($res, 21,-7);
echo $str2;