从用户输入中查找类似的wordpress帖子

Question

im trying to show the closest matching wordpress post depending on user input. I have tried using levenstheins distance as you can see below but it doesn't work. If anyone also know how to show the content of the posts that is selected it would be great.

The code I have this far is below. Thanks!

 $gallery_args = array(
                    'posts_per_page'   => -1,
                    'orderby'=> 'date',
                    'order'=> 'DESC',
                    'post_type'=> 'gallery',
                    'post_status'=> 'publish',
                    'suppress_filters' => true 
        );
        $posts_gallery = get_posts( $gallery_args ); 
        foreach($posts_gallery as $rows){
            $post_titles = $rows->post_title;
        }

       $user_input = //Users input string
       $shortest = -1;

    foreach ($post_titles as $post_title) {

    $lev = levenshtein($user_input, $post_title);

    // check for an exact match
    if ($lev == 0) {

        $closest = $post_title;
        $shortest = 0;

        break;
    }

    if ($lev <= $shortest || $shortest < 0) {
        $closest  = $post_title;
        $shortest = $lev;
    }
}

if ($shortest == 0) {
    echo "Exact match found: $closest
" . "<br />";
} else {
    echo  $closest;
}
}
} 

Answer 1

Your code works, but the $user_input-variable is missing. With that variable set, and a manually set $post_titles-array it will give you the closest matching post_title.

I've included a function (at top) to display the closest post.

My testcode:

    <?php

   function display_closest_post($thePostID) {
     $post = get_post($thePostID);
     setup_postdata($post);

     // display the post here
     the_title();
     the_excerpt();
     the_post_thumbnail();

     wp_reset_postdata();
   }

    $post_titles = [
        "1" => "car",
        "2" => "bar",
    ];

          $user_input = 'cab';
           $shortest = -1;

        foreach ($post_titles as $post_title) {

        $lev = levenshtein($user_input, $post_title);

        // check for an exact match
        if ($lev == 0) {

            $closest = $post_title;
            $closestID = get_the_ID(); //Fetch the ID of the post
            $shortest = 0;

            break;
        }

        if ($lev <= $shortest || $shortest < 0) {
            $closest  = $post_title;
            $closestID = get_the_ID(); //Fetch the ID of the post
            $shortest = $lev;
        }
    }

    if ($shortest == 0) {
        echo "Exact match found: $closest
" . "<br />";
        //Shows the whole post
        display_closest_post($closestID);
    } else {
        echo  $closest;
        //Shows the whole post
        display_closest_post($closestID);
    }

    ?>