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Fires before determining which template to load.

This action hook executes just before WordPress determines which template page to load. It is a good hook to use if you need to do a redirect with full knowledge of the content that has been queried. Note: Loading a different template is not a good use of this hook. If you include another template and then use `exit()` or `die()`, no subsequent `template_redirect` hooks will be run, which could break the site’s functionality. Instead, use the {@see 'template_include'} filter hook to return the path to the new template you want to use. This will allow an alternative template to be used without interfering with the WordPress loading process.