逻辑运算符：在这个问题上需要一些不同的眼睛。 无法弄清楚

Question

I have the code below and it results as true with the or or || logical operators. I remove the second condition and it works as expected. What am I doing wrong here?

$user = trim(get_user_role());
    if ($user != 'administrator' or $user != 'editor'){

       echo '<script type="text/javascript">';
       echo 'jQuery(".nav > li").eq(2).hide();';
       echo 'jQuery(".nav > li").eq(3).hide();';
       echo '</script>';        
}

I even echo the user and it is administrator, so I know that part is right.

Answer 1

Well, think about it.

if($user != 'administrator'... -> False->($user = 'administrator')->Check next condition.
|| $user != 'editor' -> True->($user = 'administrator)->execute.

You need to use && here.