update_site_meta ( $site_id, $meta_key, $meta_value, $prev_value = '' )

  • (int) $site_id Site ID.
  • (string) $meta_key Metadata key.
  • (mixed) $meta_value Metadata value. Must be serializable if non-scalar.
  • (mixed) $prev_value Optional. Previous value to check before removing. Default empty.
  • (int|bool) Meta ID if the key didn't exist, true on successful update, false on failure.
Defined at:


Updates metadata for a site.

Use the $prev_value parameter to differentiate between meta fields with the same key and site ID.

If the meta field for the site does not exist, it will be added.

Related Functions

update_user_meta, update_post_meta, update_term_meta, update_usermeta, populate_site_meta

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