Mah... a me funziona...
Codice PHP:
print_r (unserialize('a:5:{s:7:"results";s:7:"offline";s:3:"msg";N;s:5:"error";N;s:11:"processTime";b:1;s:7:"version";s:11:"mashery-r10";}')); 

L'array risulterebbe:


Array ( [results] => offline [msg] => [error] => [processTime] => 1 [version] => mashery-r10 )