Fatal error: Uncaught Error: Call to undefined function get_header() [closed]

Question

Fatal error: Uncaught Error: Call to undefined function get_header() in C:\xampp\htdocs\allegiant\index.php:1 Stack trace: #0 {main} thrown in C:\xampp\htdocs\allegiant\index.php on line 1

I downloaded a template web free of wordpress, but i have problems with the code of this template web, when i´m going to open the file index.html, show me a mistake or

"Fatal error: Uncaught Error: Call to undefined function get_header()"

i has been try of give it a solution, but shows me this

"Call to undefined function get_header() "

and i can not see or put it together. searched for em all places, but i don´t found a solution for my problem i need help with this problem. here i will leave the code

i don´t speak your lenguage, sorry for my mistakes when i write :(

Answer 1

get_header() is a Wordpress template tag, so only available within Wordpress. You are using a Wordpress theme and by mistake placed it in the root folder of your site.
Place it within your WordPress installation folder in wp-content/themes/ folder. And finally activate in through dashboard by navigating to Appearance -> Themes.