Source View: pre_update_site_option_{$option}

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
3853  *
3854  * @param string $option Name of option. Expected to not be SQL-escaped.
3855  * @param mixed $value Option value. Expected to not be SQL-escaped.
3856  * @return bool False if value was not updated and true if value was updated.
3857  */
3858 function update_site_option( $option, $value ) {
3859      global $wpdb;
3860
3861      $oldvalue = get_site_option( $option );
3862      $value = apply_filters( 'pre_update_site_option_' . $option, $value, $oldvalue );
3863
3864      if ( $value === $oldvalue )
3865           return false;
3866
3867      if ( !is_multisite() ) {
3868           $result = update_option( $option, $value );
3869      } else {
3870           $cache_key = "{$wpdb->siteid}:$option";
3871