在PHP中检查会话值数组

Question

There is an array of user states stored in the session. This works:

<?php if ($_SESSION['_app_user']['data']['state']['1']) { ?>

  <p>User has state 1</p>

<?php } ?>

But, selecting multiple states doesn't:

<?php if ($_SESSION['_app_user']['data']['state']['1,6,10']) { ?>

  <p>User has state 1 or 6 or 10</p>

<?php } ?>

How can you check on multiple states?

Answer 1

By checking multiple.

You may find it easier to store the least common denominator to a temporary variable:

$s = $_SESSION['_app_user']['data']['state'];
if(isset($s[1]) || isset($s[6]) || isset($s[10])) {
    echo 'Tahdah!';
}
unset($s);

Also, please use quotes for your strings. It makes code clearer, and saves the PHP interpreter a bit of effort guessing that you mean a string instead of, say, a constant named _app_user :)