You upload an Excel spreadsheet through a PHP form, wait for the request to finish, and receive a server error instead of an import confirmation. A smaller spreadsheet works perfectly, which makes the problem look like a bug in your upload code.

The good news is that you usually don't need to rewrite the uploader. By following these steps, you'll identify which server limit is rejecting the request, adjust the correct setting, and verify that PHP or Laravel can receive the file.

The error often appears as:

Request Entity Too Large

The requested resource does not allow request data with POST requests, or the amount of data provided in the request exceeds the capacity limit.

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The important part is the HTTP status. A 413 Content Too Large response (its current name in RFC 9110; Apache and Nginx still print the older name "Request Entity Too Large") usually means that an incoming request exceeds a configured limit.…