Failed to open stream: No such file or directory

You can get errors like this: failed to open stream: No such file or directory in foo.php on line 45 if you reference a file that doesn't exist.

To troubleshoot the problem, look in the file given, at the line given. (For this example, you would look at file foo.php on line 45.) The file mentioned on that line is the one that PHP can't find.

If you have a file named exists.php and you do NOT have a file named does_not_exist.php

WRONG include 'does_not_exist.php;  // In our example, this would be at line 45 of foo.php

RIGHT include 'exists.php;