Does session_start() clear cookies data?

Question

I built a tree menu with treeview , having the option persist set to cookie. When I click a submenu of a particular menu then I call an ajax to retrieve database data and rewrite accordingly the code of the HTML unordered list of the tree menu, then I rebuild the menu by calling treeview .

In that ajax I call session_start() at the beginning. My question is : does session_start() clear any previously set cookie ?

Answer 1

否。它可能会添加另一个cookie作为会话cookie，并且如果该cookie名称与任何先前设置的cookie冲突，则该cookie可能会被删除或覆盖或对PHP不可访问，但这不是通常的情况。

Answer 2

session_start allow you to manage sessions:

1- take control over an existing session

2- create new session

• manipulate some header directive

Answer 3

Unless your first cookie is set using the $_SESSION variable then they shouldn't affect each other. Regular cookies and PHP sessions are independent.