External magento 2 reindex reset

PHP file using magento function to reindex reset or show status of indexers for magento 2

This file must be password protected all the times.

Upload this file reindex_core.php to a new directory in document root ie: public_html. Password protect the folder.

For Cpanel / Centoswebpanel server

##############htaccess##########

AuthName "[login user]"
  
AuthType Basic

AuthUserFile /home/[username]/.htpasswd
  
Require valid-user

###############

htpasswd -c /home/[username]/.htpasswd [login user]
  
Provide a password

chown [username]:[username] /home/[username]/.htpasswd
  
chmod 644 /home/[username]/.htpasswd 

Many thanks to shyam krishna for his time.