WP_Upgrader_Skin::error( string|WP_Error $errors )

Source

public function error( $errors ) {
	if ( ! $this->done_header ) {
		$this->header();
	}
	if ( is_string( $errors ) ) {
		$this->feedback( $errors );
	} elseif ( is_wp_error( $errors ) && $errors->has_errors() ) {
		foreach ( $errors->get_error_messages() as $message ) {
			if ( $errors->get_error_data() && is_string( $errors->get_error_data() ) ) {
				$this->feedback( $message . ' ' . esc_html( strip_tags( $errors->get_error_data() ) ) );
			} else {
				$this->feedback( $message );
			}
		}
	}
}

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