My Code getting authors written post categories but just 2 ID has author lists category.. I replace $current_user->ID but it is not worked.

    $categories = $wpdb->get_results("
        SELECT DISTINCT(terms.term_id) as ID, terms.name, terms.slug
        FROM $wpdb->posts as posts
        LEFT JOIN $wpdb->term_relationships as relationships ON posts.ID = relationships.object_ID
        LEFT JOIN $wpdb->term_taxonomy as tax ON relationships.term_taxonomy_id = tax.term_taxonomy_id
        LEFT JOIN $wpdb->terms as terms ON tax.term_id = terms.term_id
        WHERE 1=1 AND (
            posts.post_status = 'publish' AND
            posts.post_author = '2' AND
            tax.taxonomy = 'category' )
        ORDER BY terms.name ASC
        <?php foreach($categories as $category) : ?>
            <a href="<?php echo get_category_link( $category->ID ); ?>" title="<?php echo $category->name ?>"><?php echo $category->name ?></a>
        <?php endforeach; ?>

1 Answer 1


try something like this...

you need to first call global $post;

then get the author id like $author_id = $post->post_author;

  • 1
    I have a question again. I used this code in sidebar.php its worked perfectly but when i use thats code with sidebar php widget.( My plugin 'exec-php' ) i see error : 'Fatal error: Call to a member function get_results() on a non-object in website.com\wp-content\plugins\exec-php\includes\runtime.php(42) : eval()'d code on line 3' and runtime.php 42 line have this code: eval("?>$content<?php "); How can i use it in my php widget. I changed code a little it here
    – Genxer
    Commented Jan 15, 2013 at 19:15
  • try adding global $wpdb; Commented Jan 16, 2013 at 0:35
  • 1
    that would then be global $post, $wpdb; Commented Jan 16, 2013 at 0:36

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