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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 758 | $wpdb->query("UPDATE $wpdb->posts SET guid = '" . get_permalink($post_ID) . "' WHERE ID = '$post_ID'"); |
| 759 | |
| 760 | $post = get_post($post_ID); |
| 761 | if ( !empty($page_template) ) |
| 762 | $post->page_template = $page_template; |
| 763 | |
| 764 | wp_transition_post_status($post_status, $previous_status, $post); |
| 765 | |
| 766 | if ( $update) |
| 767 | do_action('edit_post', $post_ID, $post); |
| 768 | |
| 769 | do_action('save_post', $post_ID, $post); |
| 770 | do_action('wp_insert_post', $post_ID, $post); |
| 771 | |
| 772 | return $post_ID; |
| 773 | } |
| 774 | |
| 775 | function wp_update_post($postarr = array()) { |
| 776 | global $wpdb; |
| Line | Code |
| 823 | if ( 'publish' == $post->post_status ) |
| 824 | return; |
| 825 | |
| 826 | $wpdb->query( "UPDATE $wpdb->posts SET post_status = 'publish' WHERE ID = '$post_id'" ); |
| 827 | |
| 828 | $old_status = $post->post_status; |
| 829 | $post->post_status = 'publish'; |
| 830 | wp_transition_post_status('publish', $old_status, $post); |
| 831 | |
| 832 | do_action('edit_post', $post_id, $post); |
| 833 | do_action('save_post', $post_id, $post); |
| 834 | do_action('wp_insert_post', $post_id, $post); |
| 835 | } |
| 836 | |
| 837 | function wp_add_post_tags($post_id = 0, $tags = '') { |
| 838 | return wp_set_post_tags($post_id, $tags, true); |
| 839 | } |
| 840 | |
| 841 | function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) { |