php - How can I make a reusable WordPress function? -


i have routine generates list of related posts, intended use in single.php:

  //for use in loop, list 5 post titles related first tag on current post   $tags = wp_get_post_tags($post->id);   if ($tags) {       echo 'related posts';       $first_tag = $tags[0]->term_id;       $args=array(         'tag__in' => array($first_tag),         'post__not_in' => array($post->id),         'showposts'=>5,         'caller_get_posts'=>1        );       $my_query = new wp_query($args);       if( $my_query->have_posts() ) {         while ($my_query->have_posts()) : $my_query->the_post(); ?>           <a href="<?php the_permalink() ?>" rel="bookmark" title="permanent link <?php the_title_attribute(); ?>"><?php the_title(); ?></a>            <?php         endwhile;       }     wp_reset_query();    }

what need add function.php can call function in wordpress post editor?

as $post variable global in wp, can following:

function dostuff() {     global $post;      $tags = wp_get_post_tags($post->id);     if ($tags) {     echo 'related posts';     $first_tag = $tags[0]->term_id;     $args=array(         'tag__in' => array($first_tag),         'post__not_in' => array($post->id),         'showposts'=>5,         'caller_get_posts'=>1     );     $my_query = new wp_query($args);     if( $my_query->have_posts() ) {         while ($my_query->have_posts()) : $my_query->the_post(); ?>         <a href="<?php the_permalink() ?>" rel="bookmark" title="permanent link <?php the_title_attribute(); ?>"><?php the_title(); ?></a>          <?php         endwhile;     }     wp_reset_query();     } }

now can put <?php dostuff() ?> in template.

note however, functions using $post must used within “the loop”.


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