A library for PHP, please give me more information.

I often work behind closed doors and know very little about other things in PHP.
Today when I was studying Typeche, I encountered something similar:

<code>a:2:{s:7:"logoUrl";N;s:12:"sidebarBlock";a:5:{i:0;s:15:"ShowRecentPosts";i:1;s:18:"ShowRecentComments";i:2;s:12:"ShowCategory";i:3;s:11:"ShowArchive";i:4;s:9:"ShowOther";}}</code>

<code>&lt;?php exit;//a:4:{i:4;a:1:{i:0;a:3:{s:6:"tagurl";s:18:"%E4%B8%8D%E7%9D%A1";s:7:"tagname";s:6:"不睡";s:3:"tid";i:2;}}i:3;a:1:{i:0;a:3:{s:6:"tagurl";s:18:"%E6%B0%B4%E6%B0%B4";s:7:"tagname";s:6:"水水";s:3:"tid";i:1;}}i:2;a:0:{}i:1;a:0:{}}</code>

The database configuration, I want to know the relevant information about the configuration of this format. Baidu is not as good as Baidu. I can’t find the tracking code today. Please give me some advice.