Changeset 48214 for trunk/src/wp-includes/post.php

Timestamp:

06/29/2020 09:20:11 PM (4 years ago)

Author:

SergeyBiryukov

Message:

Docs: Improve documentation for the $prev_value parameter and return result of various metadata update functions.

Props stevenlinx.
Fixes #50502. See #49572.

File:

• trunk/src/wp-includes/post.php (modified) (1 diff)

trunk/src/wp-includes/post.php

@@ -2141 +2141 @@
  * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
  * @param mixed  $prev_value Optional. Previous value to check before updating.
- *                           Default empty.
+ *                           If specified, only update existing metadata entries with
+ *                           this value. Otherwise, update all entries. Default empty.
  * @return int|bool Meta ID if the key didn't exist, true on successful update,
- *                  false on failure.
+ *                  false on failure or if the value passed to the function
+ *                  is the same as the one that is already in the database.
  */
 function update_post_meta( $post_id, $meta_key, $meta_value, $prev_value = '' ) {