Reading empty AWS instance user data in Php causes Nginx error - php

I'm constantly getting this error in the Nginx logs:
FastCGI sent in stderr: "PHP message: PHP Warning: file_get_contents(http://instance-data/latest/user-data): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found
The reason is that http://instance-data/latest/user-data is the AWS instance user data which is empty for this server.
How can I still read user-data in PHP, even if it is empty, without getting the error?


A short commit:
#file_get_contents("http://instance-data/latest/user-data");

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