php8.2，php8.3使用者安裝flarum注意關閉display_errors!
不管是註冊（實際註冊成功但報錯），還是SMTP郵件配置測試傳送，以及一系列類似下面這種200報錯的奇怪問題
`POST https://xxxxxxxxxx/register <br /> <b>Deprecated</b>: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in <b>/www/wwwroot/inter-knot.com/vendor/fof/doorman/src/Listeners/ValidateDoorkey.php</b> on line <b>43</b><br /> <br /> <b>Fatal error</b>: Uncaught Laminas\HttpHandlerRunner\Exception\EmitterException: Output has been emitted previously; cannot emit response in /www/wwwroot/inter-knot.com/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php:20 Stack trace: #0 /www/wwwroot/inter-knot.com/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitterTrait.php(42): Laminas\HttpHandlerRunner\Exception\EmitterException::forOutputSent() #1 /www/wwwroot/inter-knot.com/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitter.php(21): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->assertNoPreviousOutput() #2 /www/wwwroot/inter-knot.com/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(75): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->emit() #3 /www/wwwroot/inter-knot.com/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run() #4 /www/wwwroot/inter-knot.com/public/index.php(26): Flarum\Http\Server->listen() #5 {main} thrown in <b>/www/wwwroot/inter-knot.com/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php</b> on line <b>20</b><br /> `
記住關閉php display_errors！【建議加入安裝教程】特殊說明。查了一早上查不到類似報錯，就記得好像是個常見問題，但是又一下反應不過來哪裡有問題。想了半天想起來了，以寶塔舉例，去軟體商店-以安裝軟體，php-設定，配置修改，關閉display_errors即可如圖：
然後SMTP就不會“糟糕，出錯啦”