Solve the problem of "headers already sent" error when starting WordPress plug-in

Today, when Snail installed a WordPress plug-in, there was a prompt in the background "\\" This plug-in produced an abnormal output of xxx characters during the activation process. If you encounter the "headers already sent" error, joint feed ( Such as RSS) errors, please try to disable or remove this plug-in.\\" problem, what exactly is causing this problem?

Generally, there are several possibilities for such a problem. Do we have an error message enabled in WordPress? For example, do we enable it on the wp-config.php page:

define(\\’WP_DEBUG\\’, true);

If so, we can replace it with:

define(\\’WP_DEBUG\\’, false);

It is also possible that our PHP is incompatible. Check whether the plug-in requires which PHP version to be compatible with. Secondly, let’s see if the plug-in reports an error and asks the developer if the error was reported without closing the prompt. Sometimes errors are reported intentionally when developing plug-ins, and then they can be easily solved.

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