After following, you can keep track of his dynamic information in a timely manner
Courses in the relevant section：Variable Scope and Teacher-Student Interaction
1、8种常见的数据类型； 2、类型测试函数有那些； 3、is_null(),empty(),is_set()区别与联系；
2018-01-290个赞
Courses in the relevant section：Detailed explanation of the use of common array functions (Part 1)
栈名：zhan 名，不是jian 名，不要误导学员
2018-01-290个赞
