how to parse wordpress post_meta table values

Question

I have to parse wordpress post_meta table , particularly \"_wp_attachment_metadata\" field

For example:

Its value is for a po

Answer 1

What I understand is:

There are two types of variables, for example:

1. a:6:
2. s:3:

a = array and 6 is the dimension of the array
s = string and 3 is the length of the string