php - require_once () or die() not working

Question

Does anyone know why my require_once () or die(); is not working. It's always shown the Fatal error instead of the error message that I key in into the die(). See below for my code:

require_once ('abc.php') or die("oops");

Error message display as below

"Fatal error: controller::require_once() [function.require]: Failed opening required '1' (include_path='....."

instead of the message ("oops") I key in.

Answer 1

or has a higher precedence than require/require_once. Therefore php evaluates

('abc.php') or die("oops")

before passing the result to require_once. Or takes two boolean operands. ('abc.php') evaluates to true therefore the whole expression is true and

require_once true;

is invoked. require_once takes a string, bool(true)->string => 1 =>

Failed opening required '1'

You don't need the or die(...) there. If the file can't be read require_once will stop the php instance anyway.