Can't display C/C++ code correctly after adding/saving/inserting code into mysql table

Question

code like that with < (left angle bracket)=>

#include<iostream>
#include<vector>
#include<string>

It's displayed as =>

#include
#include
#include

code after <(left angle bracket) is deleted. Why does it occur?

posts table=>

mysql> describe posts;
+-------------+--------------+------+-----+---------+----------------+
| Field       | Type         | Null | Key | Default | Extra          |
+-------------+--------------+------+-----+---------+----------------+
| id          | int(11)      | NO   | PRI | NULL    | auto_increment |
| user_id     | int(11)      | NO   |     | NULL    |                |
| title       | varchar(255) | NO   |     | NULL    |                |
| body        | text         | YES  |     | NULL    |                |
| category_id | int(11)      | NO   |     | NULL    |                |
| tags        | varchar(50)  | NO   |     | NULL    |                |
| mark        | tinyint(4)   | NO   |     | 1       |                |
| created     | datetime     | YES  |     | NULL    |                |
| modified    | datetime     | YES  |     | NULL    |                |
+-------------+--------------+------+-----+---------+----------------+
9 rows in set (0.00 sec)

Answer 1

It would help if you showed your output code from your view, but you should be able to do something like this:

echo htmlentities($listposts['Post']['body']);