Error when adding php file (contact form)

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- [X] I have checked to see if my question is addressed in the [FAQ](https://github.com/aws-amplify/amplify-hosting/blob/master/FAQ.md).
- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-hosting/issues?q=is%3Aissue+).
- [X] I have read the guide for [submitting questions](https://github.com/aws-amplify/amplify-hosting/blob/master/CONTRIBUTING.md).
- [X] I have removed any sensitive information from my code snippets and submission.

### App Id

New_app

### AWS Region

us-east-1

### Amplify Hosting feature

One click deploy

### Question

When I deploy one page in all html, there are no issues.
however, when I add a contact form calling php in html.index with a submit.php in the folder, an error message pops up 'syle file not available'
any idea why with php files browser us not able to display the site

Review the one-click deployment behavior for the named html.index and submit.php files, starting with whether PHP execution is supported by Amplify Hosting. Reproduce the reported styling error with the described contact form; done means either identifying the deployment failure and its fix or clearly documenting the hosting limitation.

Written by the indexing model from the issue text.