Why might Apache hang when executing file_get_contents?

Denver freezes when executing the code on the website below. What could be causing the problem?

file_get_contents("http://the-system.org/engine/engine.php")

I tried to limit the number of characters read, the result is the same.

file_get_contents("http://the-system.org/engine/engine.php",NULL,NULL,0,1024);

Answer 1, authority 100%

Problem with this site or any other too?

try:

ini_set('default_socket_timeout', 3); //  3       .
file_get_contents("http://the-system.org/engine/engine.php");

Answer 2

Check file permissions


Answer 3

Error when the volume is very large or there is no access (404) to the page


Answer 4

use Curl