How to copy title of WP post dynamically to focus keyword field in Yoast SEO

Question

I have around 1K posts in my blog. I use Yoast SEO Wordpress Plugin. All my posts doesn't has focus keyword added. Is there any way possible I can add title of the post dynamically to focus keyword field instead of copy paste one by one?

Answer 1

$title = get_the_title();
$args = array('posts_per_page' => -1, 'post_type' => 'post');
$posts = new WP_Query($args);

foreach($posts as $post){
    update_post_meta($post->ID, '_yoast_wpseo_focuskw', $title);
}

wp_reset_postdata();

this is a sample code like this create a loop that loops through all the post and then update the post meta 

and after that create a blank page that doesnt contain a loop and add this code in it 

$posts_query = new WP_Query(
        array(
            'post_type' => 'post',
            'posts_per_page' => -1
        )
    );

    while($posts_query->have_posts()) : $posts_query->the_post();
        $title = get_the_title();
        $post_id = get_the_ID();

        update_post_meta($post_id, '_yoast_wpseo_focusk‌​w', $title);

        echo $title . ' Meta Updated<br />';
    endwhile;

after that create a page using this page template