Auto generator SEO keywords or KeyPhrases by function.php code on WordPress website

Auto generator SEO keywords or KeyPhrases as title of post

past this code on down to the function.php code

only for title

/**
 * Set default focus keyphrase for all products, posts, pages, and product categories.
 */
function set_default_focus_keyphrase_for_content() {
    // Check if WooCommerce is active
    if (class_exists('WooCommerce')) {
        // Query all products
        set_default_focus_keyphrase_for_content_type('product');
        
        // Query all product categories
        set_default_focus_keyphrase_for_taxonomy('product_cat');
    }

    // Query all posts
    set_default_focus_keyphrase_for_content_type('post');

    // Query all pages
    set_default_focus_keyphrase_for_content_type('page');
}

function set_default_focus_keyphrase_for_content_type($post_type) {
    $args = array(
        'post_type'      => $post_type,
        'posts_per_page' => -1,
    );

    $content = new WP_Query($args);

    // Loop through content
    while ($content->have_posts()) {
        $content->the_post();

        // Set default focus keyphrase to "Today Top News" + post title (limited to 15 words), remove commas, add "Blogstour"
        $title = get_the_title();
        $title_words = explode(' ', $title);
        $limited_title = implode(' ', array_slice($title_words, 0, 15));
        $default_focus_keyphrase = '' . str_replace(',', '', $limited_title) . '';

        // Update focus keyphrase
        update_post_meta(get_the_ID(), '_yoast_wpseo_focuskw', $default_focus_keyphrase);
    }

    // Reset post data
    wp_reset_postdata();
}

function set_default_focus_keyphrase_for_taxonomy($taxonomy) {
    $terms = get_terms(array(
        'taxonomy'   => $taxonomy,
        'hide_empty' => false,
    ));

    foreach ($terms as $term) {
        // Set default focus keyphrase to "Today Top News" + term name (limited to 15 words), remove commas, add "Blogstour"
        $term_name = $term->name;
        $term_words = explode(' ', $term_name);
        $limited_term_name = implode(' ', array_slice($term_words, 0, 15));
        $default_focus_keyphrase = 'Today Top News ' . str_replace(',', '', $limited_term_name) . ' Blogstour - ' . get_bloginfo('name');

        // Update focus keyphrase
        update_term_meta($term->term_id, '_yoast_wpseo_focuskw', $default_focus_keyphrase);
    }
}

// Hook the function to run on a specific action, e.g., 'init'
add_action('init', 'set_default_focus_keyphrase_for_content');

add txt after title replace ” Home Delivery Services by FoodSala” into your txte

/**
 * Set default focus keyphrase for all products, posts, pages, and product categories.
 */
function set_default_focus_keyphrase_for_content() {
    // Check if WooCommerce is active
    if (class_exists('WooCommerce')) {
        // Query all products
        set_default_focus_keyphrase_for_content_type('product');
        
        // Query all product categories
        set_default_focus_keyphrase_for_taxonomy('product_cat');
    }

    // Query all posts
    set_default_focus_keyphrase_for_content_type('post');

    // Query all pages
    set_default_focus_keyphrase_for_content_type('page');
}

function set_default_focus_keyphrase_for_content_type($post_type) {
    $args = array(
        'post_type'      => $post_type,
        'posts_per_page' => -1,
    );

    $content = new WP_Query($args);

    // Loop through content
    while ($content->have_posts()) {
        $content->the_post();

        // Set default focus keyphrase to "Today Top News" + post title (limited to 15 words), remove commas, add "Blogstour"
        $title = get_the_title();
        $title_words = explode(' ', $title);
        $limited_title = implode(' ', array_slice($title_words, 0, 15));
        $default_focus_keyphrase = '' . str_replace(',', '', $limited_title) . ' - Food Delivery Services by FoodSala';

        // Update focus keyphrase
        update_post_meta(get_the_ID(), '_yoast_wpseo_focuskw', $default_focus_keyphrase);
    }

    // Reset post data
    wp_reset_postdata();
}

function set_default_focus_keyphrase_for_taxonomy($taxonomy) {
    $terms = get_terms(array(
        'taxonomy'   => $taxonomy,
        'hide_empty' => false,
    ));

    foreach ($terms as $term) {
        // Set default focus keyphrase to "Today Top News" + term name (limited to 15 words), remove commas, add "Blogstour"
        $term_name = $term->name;
        $term_words = explode(' ', $term_name);
        $limited_term_name = implode(' ', array_slice($term_words, 0, 15));
        $default_focus_keyphrase = 'Today Top News ' . str_replace(',', '', $limited_term_name) . ' Blogstour - ' . get_bloginfo('name') . ' Home Delivery Services by FoodSala';

        // Update focus keyphrase
        update_term_meta($term->term_id, '_yoast_wpseo_focuskw', $default_focus_keyphrase);
    }
}

// Hook the function to run on a specific action, e.g., 'init'
add_action('init', 'set_default_focus_keyphrase_for_content');