The default WordPress installation provides public access to the content on the frontend of the site. There are situations where we need to make the site private for improving security as well as only giving site access to a specific set of members. WordPress doesn't provide built-in features for protecting the entire site. So, we have to build a custom feature for protecting the site with a single password and restrict access to the users without the global password.
In this recipe, we are going to create a custom form and load it on each request for submitting the password and gaining access to the site.