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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 398 | global $wpdb, $wp_rewrite; |
| 399 | $postid = (int) $postid; |
| 400 | |
| 401 | if ( !$post = $wpdb->get_row("SELECT * FROM $wpdb->posts WHERE ID = $postid") ) |
| 402 | return $post; |
| 403 | |
| 404 | if ( 'attachment' == $post->post_type ) |
| 405 | return wp_delete_attachment($postid); |
| 406 | |
| 407 | do_action('delete_post', $postid); |
| 408 | |
| 409 | if ( 'publish' == $post->post_status && 'post' == $post->post_type ) { |
| 410 | $categories = wp_get_post_categories($post->ID); |
| 411 | if( is_array( $categories ) ) { |
| 412 | foreach ( $categories as $cat_id ) { |
| 413 | $wpdb->query("UPDATE $wpdb->categories SET category_count = category_count - 1 WHERE cat_ID = '$cat_id'"); |
| 414 | wp_cache_delete($cat_id, 'category'); |
| 415 | do_action('edit_category', $cat_id); |
| 416 | } |