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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 255 | * |
| 256 | * @since 2.9.0 |
| 257 | * |
| 258 | * @param int $meta_id ID of metadata entry to update. |
| 259 | * @param int $object_id Post ID. |
| 260 | * @param string $meta_key Meta key. |
| 261 | * @param mixed $meta_value Meta value. This will be a PHP-serialized string representation of the value if |
| 262 | * the value is an array, an object, or itself a PHP-serialized string. |
| 263 | */ |
| 264 | do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | $result = $wpdb->update( $table, $data, $where ); |
| 269 | if ( ! $result ) { |
| 270 | return false; |
| 271 | } |
| 272 | |
| 273 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
| Line | Code |
| 732 | // Format the where query arguments. |
| 733 | $where = array(); |
| 734 | $where[ $id_column ] = $meta_id; |
| 735 | |
| 736 | /** This action is documented in wp-includes/meta.php */ |
| 737 | do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); |
| 738 | |
| 739 | if ( 'post' == $meta_type ) { |
| 740 | /** This action is documented in wp-includes/meta.php */ |
| 741 | do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 742 | } |
| 743 | |
| 744 | // Run the update query, all fields in $data are %s, $where is a %d. |
| 745 | $result = $wpdb->update( $table, $data, $where, '%s', '%d' ); |
| 746 | if ( ! $result ) { |
| 747 | return false; |
| 748 | } |
| 749 | |
| 750 | // Clear the caches. |