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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 |
---|---|
1023 | function wp_delete_post($postid = 0) { |
1024 | global $wpdb, $wp_rewrite; |
1025 |
|
1026 | if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) ) |
1027 | return $post; |
1028 |
|
1029 | if ( 'attachment' == $post->post_type ) |
1030 | return wp_delete_attachment($postid); |
1031 |
|
1032 | do_action('delete_post', $postid); |
1033 |
|
1034 | /** @todo delete for pluggable post taxonomies too */ |
1035 | wp_delete_object_term_relationships($postid, array('category', 'post_tag')); |
1036 |
|
1037 | $parent_data = array( 'post_parent' => $post->post_parent ); |
1038 | $parent_where = array( 'post_parent' => $postid ); |
1039 |
|
1040 | if ( 'page' == $post->post_type) { |
1041 | // if the page is defined in option page_on_front or post_for_posts, |