Verifying user permissions for each page

[Manaus]

Hello,

my user (41) logs in, I need to know if he has permission to see that page. To enforce granularity, each page has a 'user' field, for example (41|1010). 

How do I check whether the user can see that page? I'm evaluating the strpos php function, but I fear it might lead to error. Note it's not about roles, each user can see one or more pages.

Thank you very much

[arjen]

if ($page->user->has($user))
{
    // Do stuff
}

Not tested, but something like this would work since the "user" fields returns a array which you can check all kinds of thing in. See the cheatsheet for more info.