Fatal Error with WordPress 7.0 Beta 2

[threadi]

Using WordPress 7.0 Beta 2 with the Plugin Checker Plugin results in the following fatal error:

Fatal error: Declaration of WP_AI_Client_HTTP_Client::sendRequestWithOptions(WordPress\AiClientDependencies\Psr\Http\Message\RequestInterface $request, WordPress\AiClient\Providers\Http\DTO\RequestOptions $options): WordPress\AiClientDependencies\Psr\Http\Message\ResponseInterface must be compatible with WordPress\AiClient\Providers\Http\Contracts\ClientWithOptionsInterface::sendRequestWithOptions(Psr\Http\Message\RequestInterface $request, WordPress\AiClient\Providers\Http\DTO\RequestOptions $options): Psr\Http\Message\ResponseInterface in /var/www/clients/client0/web19/web/wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php on line 101

Steps to reproduce:

1. Install a clean WordPress 7.0 Beta 2.
2. Run: wp plugin install plugin-check
3. Run: wp plugin activate plugin-check => error

Stack trace:

Fatal error: Declaration of WP_AI_Client_HTTP_Client::sendRequestWithOptions(WordPress\AiClientDependencies\Psr\Http\Message\RequestInterface $request, WordPress\AiClient\Providers\Http\DTO\RequestOptions $options): WordPress\AiClientDependencies\Psr\Http\Message\ResponseInterface must be compatible with WordPress\AiClient\Providers\Http\Contracts\ClientWithOptionsInterface::sendRequestWithOptions(Psr\Http\Message\RequestInterface $request, WordPress\AiClient\Providers\Http\DTO\RequestOptions $options): Psr\Http\Message\ResponseInterface in /var/www/clients/client0/web19/web/wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php on line 101
Fatal error: Uncaught Error: Call to a member function set() on null in /var/www/clients/client0/web19/web/wp-includes/l10n.php:857
Stack trace:
#0 /var/www/clients/client0/web19/web/wp-includes/l10n.php(960): load_textdomain()
#1 /var/www/clients/client0/web19/web/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /var/www/clients/client0/web19/web/wp-includes/l10n.php on line 857

[davidperezgar]

Hello!
Thank you for pointing this out. We will work to solve the issue before the launch of WordPress 7.0.

[davidperezgar]

@ernilambar Could you check it also? We use WP AI Client in composer library, that's why it shouldn't conflict. It's not giving me errors for the version version 7.0-beta2-61775.

[davidperezgar]

In WordPress Core are discussing about this topic:
https://core.trac.wordpress.org/ticket/64697#comment:22

[ernilambar]

WordPress/ai#242 (comment)

With the WP AI Client now merged into Core, the project will effectively be discontinued. Only PHP AI Client will be maintained as an external library, but even that WordPress plugins should not require via Composer because it's bundled in Core.

[shameemreza]

Hi @davidperezgar, just wanted to flag that this issue is still actively affecting users. I'm running WordPress 7.0-beta5 (latest beta) with Plugin Check 1.8.0 (latest on WordPress.org), and I'm hitting the exact same fatal error on every page load:

PHP Fatal error: Declaration of WP_AI_Client_HTTP_Client::sendRequestWithOptions(
  WordPress\AiClientDependencies\Psr\Http\Message\RequestInterface $request, ...
): WordPress\AiClientDependencies\Psr\Http\Message\ResponseInterface must be compatible with
WordPress\AiClient\Providers\Http\Contracts\ClientWithOptionsInterface::sendRequestWithOptions(
  Psr\Http\Message\RequestInterface $request, ...
): Psr\Http\Message\ResponseInterface
in wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php on line 101

Environment:

• WordPress 7.0-beta5
• PHP 8.3.30
• Plugin Check 1.8.0 (latest on WordPress.org)
• Other active plugins: Akismet, WooCommerce, custom plugin (no AI dependencies)

The root cause is the same: Plugin Check 1.8.0 bundles an unprefixed php-ai-client at vendor/wordpress/php-ai-client/ whose ClientWithOptionsInterface imports Psr\Http\Message\RequestInterface, while WP 7.0 core's copy uses the prefixed WordPress\AiClientDependencies\Psr\Http\Message\RequestInterface. When both autoloaders are active, the interface mismatch triggers the fatal.

I see the fix was merged in #1195 for the 1.9.0 milestone, but 1.9.0 hasn't been released yet. So anyone beta-testing WP 7.0 with Plugin Check installed is broken with no workaround except deactivating Plugin Check.

Is there an ETA for the 1.9.0 release? It would be great to have this shipped before WordPress 7.0 RC1 so beta testers can use both together.

[davidperezgar]

We want to release very soon.