500 error when connecting ajax php file?

Question

WordPress

I want to hide a piece of the page from search engines through ajax.
I include .php file

$.ajax({
            url: "/some.php",
            type: "post",
            dataType: "json",
            data: {
                "btn":   btn,
                "back":   back,
                "title":   title,
                "cell":  cell
            },
            success: function(data){
                    console.log( "Прибыли данные: " + data.result );
            }
        });

in the some.php file itself, a piece of the page is assembled.
as I understand it, the error is thrown on the lines related to the functions of the WordPress itself

wp_get_nav_menu_items()
get_the_title()
get_post_meta()

etc.
how can i fix this error?

Answer 1

Add a line to the beginning of the file and it should work . If you want to figure it out, you can read it here and look inside the file "/wp-admin/admin-ajax.php"

Answer 2

Does some.php file work directly and not via wordpress? If so, then the WP functions are not connected and, accordingly, when you try to find them, everything falls. Fix: Either serve the content you want using WP, or go on a long journey of building all the include files to include them in the script itself.