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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 4 times in this file.
| Line | Code |
|---|---|
| 2046 | $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) ); |
| 2047 | if ( $alias->term_group ) { |
| 2048 | // The alias we want is already in a group, so let's use that one. |
| 2049 | $term_group = $alias->term_group; |
| 2050 | } else { |
| 2051 | // The alias isn't in a group, so let's create a new one and firstly add the alias term to it. |
| 2052 | $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1; |
| 2053 | do_action( 'edit_terms', $alias->term_id ); |
| 2054 | $wpdb->update($wpdb->terms, compact('term_group'), array('term_id' => $alias->term_id) ); |
| 2055 | do_action( 'edited_terms', $alias->term_id ); |
| 2056 | } |
| 2057 | } |
| 2058 | |
| 2059 | if ( $term_id = term_exists($slug) ) { |
| 2060 | $existing_term = $wpdb->get_row( $wpdb->prepare( "SELECT name FROM $wpdb->terms WHERE term_id = %d", $term_id), ARRAY_A ); |
| 2061 | // We've got an existing term in the same taxonomy, which matches the name of the new term: |
| 2062 | if ( is_taxonomy_hierarchical($taxonomy) && $existing_term['name'] == $name && $exists = term_exists( (int) $term_id, $taxonomy ) ) { |
| 2063 | // Hierarchical, and it matches an existing term, Do not allow same "name" in the same level. |
| 2064 | $siblings = get_terms($taxonomy, array('fields' => 'names', 'get' => 'all', 'parent' => (int)$parent) ); |
| Line | Code |
| 2087 | return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error); |
| 2088 | $term_id = (int) $wpdb->insert_id; |
| 2089 | } |
| 2090 | |
| 2091 | // Seems unreachable, However, Is used in the case that a term name is provided, which sanitizes to an empty string. |
| 2092 | if ( empty($slug) ) { |
| 2093 | $slug = sanitize_title($slug, $term_id); |
| 2094 | do_action( 'edit_terms', $term_id ); |
| 2095 | $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) ); |
| 2096 | do_action( 'edited_terms', $term_id ); |
| 2097 | } |
| 2098 | |
| 2099 | $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) ); |
| 2100 | |
| 2101 | if ( !empty($tt_id) ) |
| 2102 | return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id); |
| 2103 | |
| 2104 | $wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent') + array( 'count' => 0 ) ); |
| 2105 | $tt_id = (int) $wpdb->insert_id; |
| Line | Code |
| 2358 | $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) ); |
| 2359 | if ( $alias->term_group ) { |
| 2360 | // The alias we want is already in a group, so let's use that one. |
| 2361 | $term_group = $alias->term_group; |
| 2362 | } else { |
| 2363 | // The alias isn't in a group, so let's create a new one and firstly add the alias term to it. |
| 2364 | $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1; |
| 2365 | do_action( 'edit_terms', $alias->term_id ); |
| 2366 | $wpdb->update( $wpdb->terms, compact('term_group'), array( 'term_id' => $alias->term_id ) ); |
| 2367 | do_action( 'edited_terms', $alias->term_id ); |
| 2368 | } |
| 2369 | } |
| 2370 | |
| 2371 | // Check $parent to see if it will cause a hierarchy loop |
| 2372 | $parent = apply_filters( 'wp_update_term_parent', $parent, $term_id, $taxonomy, compact( array_keys( $args ) ), $args ); |
| 2373 | |
| 2374 | // Check for duplicate slug |
| 2375 | $id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE slug = %s", $slug ) ); |
| 2376 | if ( $id && ($id != $term_id) ) { |
| Line | Code |
| 2381 | else |
| 2382 | return new WP_Error('duplicate_term_slug', sprintf(__('The slug “%s” is already in use by another term'), $slug)); |
| 2383 | } |
| 2384 | do_action( 'edit_terms', $term_id ); |
| 2385 | $wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) ); |
| 2386 | if ( empty($slug) ) { |
| 2387 | $slug = sanitize_title($name, $term_id); |
| 2388 | $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) ); |
| 2389 | } |
| 2390 | do_action( 'edited_terms', $term_id ); |
| 2391 | |
| 2392 | $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id) ); |
| 2393 | do_action( 'edit_term_taxonomy', $tt_id, $taxonomy ); |
| 2394 | $wpdb->update( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ), array( 'term_taxonomy_id' => $tt_id ) ); |
| 2395 | do_action( 'edited_term_taxonomy', $tt_id, $taxonomy ); |
| 2396 | |
| 2397 | do_action("edit_term", $term_id, $tt_id, $taxonomy); |
| 2398 | do_action("edit_$taxonomy", $term_id, $tt_id); |
| 2399 | |