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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 |
|---|---|
| 293 | * |
| 294 | * @since 2.9.0 |
| 295 | * |
| 296 | * @param int $meta_id ID of metadata entry to update. |
| 297 | * @param int $object_id Post ID. |
| 298 | * @param string $meta_key Metadata key. |
| 299 | * @param mixed $meta_value Metadata value. This will be a PHP-serialized string representation of the value |
| 300 | * if the value is an array, an object, or itself a PHP-serialized string. |
| 301 | */ |
| 302 | do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | $result = $wpdb->update( $table, $data, $where ); |
| 307 | if ( ! $result ) { |
| 308 | return false; |
| 309 | } |
| 310 | |
| 311 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
| Line | Code |
| 931 | // Format the where query arguments. |
| 932 | $where = array(); |
| 933 | $where[ $id_column ] = $meta_id; |
| 934 | |
| 935 | /** This action is documented in wp-includes/meta.php */ |
| 936 | do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); |
| 937 | |
| 938 | if ( 'post' === $meta_type ) { |
| 939 | /** This action is documented in wp-includes/meta.php */ |
| 940 | do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
| 941 | } |
| 942 | |
| 943 | // Run the update query, all fields in $data are %s, $where is a %d. |
| 944 | $result = $wpdb->update( $table, $data, $where, '%s', '%d' ); |
| 945 | if ( ! $result ) { |
| 946 | return false; |
| 947 | } |
| 948 | |
| 949 | // Clear the caches. |