What is PHP Warning: file_get_contents()?

Question

PHP

Here is such a problem

PHP Warning: file_get_contents(): failed to open stream: HTTP request failed! HTTP/1.1 500 Internal Server Error\r\n in /var/www/html/bot.php on line 139

The script works on all hostings, I installed Ispmanager on my vps, it also works, but if I manually raise the php + apache2 + mysql server, it doesn’t plow and throws errors.
Help good people

Answer 1

In my case, the problem was with the rights to the file and the inclusionallow_url_include On

Answer 2

Good evening.
Since it works on all servers, but does not work on yours, which you configure yourself, then the problem is in the settings.
How to solve the problem - tell google .