Is it possible to override a variable during playbook startup?

Question

Ansible

Hello everyone,
if in the vars subdirectory, from the directory where the playbooks are stored in the main.yml file, I set the phpversion variable: "7.0"
can I override it during the start of the playbook? For example ansible-playbook -e "phpversion=7.1" or will the version set in main.yml still be used?

Answer 1

Here is the order of precedence from lowest to highest (the last variables listed win in terms of priority):

1. command line values ​​(eg “-u user”)
   
2. role defaults [1]
   
3. inventory file or script group vars [2]
   
4. inventory group_vars/all [3]
   
5. playbook group_vars/all [3]
   
6. inventory group_vars/* [3]
   
7. playbook group_vars/* [3]
   
8. inventory file or script host vars [2]
   
9. inventory host_vars/* [3]
   
10. playbook host_vars/* [3]
    
11. host facts / cached set_facts [4]
    
12. play wars
    
13. play vars_prompt
    
14. play vars_files
    
15. role vars (defined in role/vars/main.yml)
    
16. block vars (only for tasks in block)
    
17. task vars (only for the task)
    
18. include_vars
    
19. set_facts/registered vars
    
20. role (and include_role) params
    
21. include params
    
22. extra vars (always win precedence)
    

Variable precedence: Where should I put a variable?