%s', $field['id'], $field['name'], $desc ); } protected static function input_description( array $field ) : string { return ''; } /** * Sanitize field value. * * @param mixed $new The submitted meta value. * @param mixed $old The existing meta value. * @param int $post_id The post ID. * @param array $field The field parameters. * * @return array */ public static function value( $new, $old, $post_id, $field ) { foreach ( $new as &$arr ) { if ( empty( $arr[0] ) && empty( $arr[1] ) ) { $arr = false; } } $new = array_filter( $new ); return $new; } /** * Normalize parameters for field. * * @param array $field Field parameters. * * @return array */ public static function normalize( $field ) { $field['clone'] = true; $field['multiple'] = true; $field = parent::normalize( $field ); $field['attributes']['type'] = 'text'; $field['placeholder'] = wp_parse_args( (array) $field['placeholder'], [ 'key' => __( 'Key', 'meta-box' ), 'value' => __( 'Value', 'meta-box' ), ] ); return $field; } /** * Format value for the helper functions. * * @param array $field Field parameters. * @param string|array $value The field meta value. * @param array $args Additional arguments. Rarely used. See specific fields for details. * @param int|null $post_id Post ID. null for current post. Optional. * * @return string */ public static function format_clone_value( $field, $value, $args, $post_id ) { return sprintf( '%s: %s', $value[0], $value[1] ); } }