I have the following code and want to add a selected featured image

    $arg = array(
       'orderby'    => 'date',
       'number'     => 10,
    );
    $categories = get_categories($arg);
    foreach ($categories as $cat) {
         echo '<li>';
         echo '<figure>
                <a href="?catId='.$cat->cat_ID.'">';
                   //Add featured image from the last post??
                    get_last_post_image($cat->name);
        echo '</a>
             </figure>';
         </li>';
      } 

And I have this function:

function get_last_post_image($cat_name){
    $args = array(
        'category_name' => '$cat_name',
        'posts_per_page' => 1,
        'order_by' => 'date',
        'order' => 'desc'
    );
    $post = get_posts( $args );
    if($post) {
        $post_id = $post[0]->ID;
        if(has_post_thumbnail($post_id)){
            echo get_the_post_thumbnail($page->ID, 'thumbnail');
        }
    }
}

But the featured image is never displayed.

I have the following code and want to add a selected featured image

    $arg = array(
       'orderby'    => 'date',
       'number'     => 10,
    );
    $categories = get_categories($arg);
    foreach ($categories as $cat) {
         echo '<li>';
         echo '<figure>
                <a href="?catId='.$cat->cat_ID.'">';
                   //Add featured image from the last post??
                    get_last_post_image($cat->name);
        echo '</a>
             </figure>';
         </li>';
      } 

And I have this function:

function get_last_post_image($cat_name){
    $args = array(
        'category_name' => '$cat_name',
        'posts_per_page' => 1,
        'order_by' => 'date',
        'order' => 'desc'
    );
    $post = get_posts( $args );
    if($post) {
        $post_id = $post[0]->ID;
        if(has_post_thumbnail($post_id)){
            echo get_the_post_thumbnail($page->ID, 'thumbnail');
        }
    }
}

But the featured image is never displayed.

• images
• categories

• 1 "Title Background Image" is not a field created by WordPress Core - it's being added through either a plugin or your theme. You'll want to search through them to find out what plugin or theme is adding it, and then you can use their support channels or browse through their code to find out how they are saving it and how to retrieve it. :) – WebElaine Commented Mar 25, 2019 at 15:49
• Thanks, I edited my question consequently... – supershivas Commented Mar 25, 2019 at 16:27

1 Answer 1

Correct this line in your code at the end of function.

echo get_the_post_thumbnail($page->ID, 'thumbnail');

should be

echo get_the_post_thumbnail($post_id, 'thumbnail');

also as per Wordpress documentation, category_name parameter should be a string representing category slug, not name.

So, the complete code should look like this:

    $arg = array(
       'orderby'    => 'date',
       'number'     => 10,
    );
    $categories = get_categories($arg);
    echo '<ul>';

    foreach ($categories as $cat) {
         echo '<li>';
         echo '<figure>
                <a href="?catId='.$cat->term_id.'">'; // not cat_ID
                   //Add featured image from the last post??
                    get_last_post_image($cat->slug);
        echo '</a>
             </figure>
         </li>';
      } 
    echo '</ul>';

And the function:

function get_last_post_image($cat_slug){
    $args = array(
        'category_name' => $cat_slug, // it should be slug of category, not name.
        'posts_per_page' => 1,
        'order_by' => 'date',
        'order' => 'desc'
    );
    $post = get_posts( $args );
    if($post) {
        $post_id = $post[0]->ID;
        if(has_post_thumbnail($post_id)){
            echo get_the_post_thumbnail($post_id, 'thumbnail');
        }
    }
}