Loadcache 中 一串字符序列解释

a:3:{i:0;a:2:{s:4:"memo";s:0:"";s:4:"type";s:7:"archive";}i:1;a:2:{s:4:"memo";s:0:"";s:4:"type";s:7:"primary";}i:2;a:2:{s:4:"memo";s:0:"";s:4:"type";s:8:"addition";}}