verify_ssl_certificate example

if ( false === $handle ) {
            // SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken.             if ( $secure_transport && 0 === $connection_error && '' === $connection_error_str ) {
                return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
            }

            return new WP_Error( 'http_request_failed', $connection_error . ': ' . $connection_error_str );
        }

        // Verify that the SSL certificate is valid for this request.         if ( $secure_transport && $ssl_verify && ! $proxy->is_enabled() ) {
            if ( ! self::verify_ssl_certificate( $handle, $parsed_url['host'] ) ) {
                return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
            }
        }

        stream_set_timeout( $handle, $timeout, $utimeout );

        if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { // Some proxies require full URL in this field.             $request_path = $url;
        } else {
            $request_path = $parsed_url['path'] . ( isset( $parsed_url['query'] ) ? '?' . $parsed_url['query'] : '' );
        }