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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 |
|---|---|
| 4166 | $intermediate_sizes = array(); |
| 4167 | foreach ( get_intermediate_image_sizes() as $size ) { |
| 4168 | if ( $intermediate = image_get_intermediate_size( $post_id, $size ) ) |
| 4169 | $intermediate_sizes[] = $intermediate; |
| 4170 | } |
| 4171 | |
| 4172 | if ( is_multisite() ) |
| 4173 | delete_transient( 'dirsize_cache' ); |
| 4174 | |
| 4175 | do_action('delete_attachment', $post_id); |
| 4176 | |
| 4177 | wp_delete_object_term_relationships($post_id, array('category', 'post_tag')); |
| 4178 | wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type)); |
| 4179 | |
| 4180 | delete_metadata( 'post', null, '_thumbnail_id', $post_id, true ); // delete all for any posts. |
| 4181 | |
| 4182 | $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id )); |
| 4183 | foreach ( $comment_ids as $comment_id ) |
| 4184 | wp_delete_comment( $comment_id, true ); |