*/
    $template   = apply_filters( 'template_include', $template );
    $is_stringy = is_string( $template ) || ( is_object( $template ) && method_exists( $template, '__toString' ) );
    $template   = $is_stringy ? realpath( (string) $template ) : null;
    if (
        is_string( $template ) &&
        ( str_ends_with( $template, '.php' ) || str_ends_with( $template, '.html' ) ) &&
        is_file( $template ) &&
        is_readable( $template )
    ) {
        /**
         * Fires immediately before including the template.
         *
         * @since 6.9.0
         *
         * @param string $template The path of the template about to be included.
         */
        do_action( 'wp_before_include_template', $template );
 
        include $template;
    } elseif ( current_user_can( 'switch_themes' ) ) {
        $theme = wp_get_theme();
        if ( $theme->errors() ) {
            wp_die( $theme->errors() );
        }
    }
    return;
}
 

<?php
/**
 * Loads the WordPress environment and template.
 *
 * @package WordPress
 */
 
if ( ! isset( $wp_did_header ) ) {
 
    $wp_did_header = true;
 
    // Load the WordPress library.
    require_once __DIR__ . '/wp-load.php';
 
    // Set up the WordPress query.
    wp();
 
    // Load the theme template.
    require_once ABSPATH . WPINC . '/template-loader.php';
 
}
 

<?php
 
define('WP_USE_THEMES', true);
require __DIR__ . '/wp/wp-blog-header.php';