Failed to decode content. Content must be valid XML or JSON.

[happynnan]

EasyWeChat\Kernel\Exceptions\BadRequestException
vendor\w7corp\easywechat\src\Kernel\Support\MessageParser.php:39
Failed to decode content. Content must be valid XML or JSON.

LARAVEL13.19.0
PHP8.3.3

http://127.0.0.1:8000/aiw?echostr=V%2FEGfWKT%2FqR7%2FCOy%2Fun4UZ4Vg6BchnYGxLvPC1wC5DAKVKib%2Fo0xRzffvic6rwTV1xRYzB21HwtOET6mGZBW9g%3D%3D&msg_signature=b259d61249e3c3784016846ae1775a8b35b4dcfd&nonce=1786072394&timestamp=1785916252

Route::get('/aiw', function () {
$app = new Application(Config::get('easywechat.work.default'));
// 指定消息格式 JSON
$server = $app->getServer(messageType: 'json');
dd($server->getRequestMessage());
})

[HugoSEIGLE]

This GET request is the WeChat server verification request, so it does not contain an XML/JSON message body.

getRequestMessage() tries to parse the request body, which is why you get:

Failed to decode content. Content must be valid XML or JSON.

For the verification request, just let EasyWeChat handle it:

Route::get('/aiw', function () {
    $app = new Application(Config::get('easywechat.work.default'));

    return $app->getServer()->serve();
});

Then handle actual pushed messages on the POST request. Those requests contain the message body that getRequestMessage() can parse.

Also, don't force messageType: 'son unless WeChat is actually sending JSON. WeChat server callbacks are commonly XML depending on the API/configuration.

So the issue is not Laravel or PHP 8.3 — you are trying to parse the GET verification request as a message.