plugin gone awry?

[lukemax]

Is there a way to check a plugin to see if its working? In a hook I trying to get to work, I have this

ob_start();
include('../reviewform_hook.php');
$reviewform = ob_get_contents();
ob_end_clean();
I can get to the included file via the browser, but when I try to use the variable

$reviewform
in a template, I get nothing?
What is wrong?

[Dismounted]

Where are you hooking the plugin at?

[lukemax]

global_start, is the hook location

[Dismounted]

Replace the include with this and see if it spits out an error:
require('../reviewform_hook.php');