500 Internal Server Error for php file not for html

Question

There are barely 4-5 static pages on my website. Both index.html and index.php are present. Index.html is operating well. When I switch to index.php, a 500 Internal Server Error message appears. I'm not sure where I went wrong.

It's showing Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

If I use the .htaccess file with empty, It's showing Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

And if I give ../contact-us.php, it's showing correctly. Can someone please help me with this?

Answer 1

The problem is that your PHP code has fatal errors but the error displaying is switched off. 

In your PHP file:

ini_set('display_errors', 1);

In .htaccess file:

php_flag display_errors 1

Try the above method to display the error so that you can solve it. I hope this helps you.