String Parse to Array Format

I am having trouble parsing a string to an array

The string is as EXACTLY as follows:

the_string="[[5,6,2,0,0,0,0],[0,2,0,2,0,3,0],[0,0,0,0,0,0,0],[0,0,0,0,0,0,0]]";

I need it to go into an array like this

level[0]=[5,6,2,0,0,0,0];
level[1]=[0,2,0,2,0,3,0],
level[2]=[0,0,0,0,0,0,0];
level[3]=[0,0,0,0,0,0,0];

any help would be appreciated