After following, you can keep track of his dynamic information in a timely manner
Courses in the relevant section：Boolean type Boolean: the simplest and most useful type
非0即1，非假即真
2018-07-020个赞
Courses in the relevant section：Integer type: seemingly simple but actually very meaningful
不论什么进制，最终都是以十进制显示
2018-07-021个赞
Courses in the relevant section：String: Flexible little fairy
当碰到大段文字的时候，使用heredoc和nowdoc更为简单。<<<abc abc;
2018-07-020个赞
