注意：尝试在php中获取非对象的属性[重复]

Question

This question already has an answer here:

• PHP parse/syntax errors; and how to solve them? 17 answers

I have a problem in userpie login and register script. So the script works good using lamp on linux mint! But when I go on windows there is more than 15 problem, one of them is

Notice: Trying to get property of non-object in C:\armadicehost\htdocs\models\funcs.user.php on line 164

Notice: Trying to get property of non-object in C:\armadicehost\htdocs\models\funcs.user.php on line 165

This is the code that line 165 and 164 have:

function isUserLoggedIn()
{
    global $loggedInUser,$db,$db_table_prefix;

    $sql = "SELECT user_id,
              password
            FROM ".$db_table_prefix."users
            WHERE user_id = '".$db->sql_escape($loggedInUser->user_id)."'
                AND password = '".$db->sql_escape($loggedInUser->hash_pw)."' 
            AND
            active = 1
            LIMIT 1";
            }

    if($loggedInUser == NULL)

And for login.php it says...

Notice: Undefined index: status in C:\armadicehost\htdocs\login.php on line 401

    <?php
    if(!empty($_POST))
    {
    ?>
    <?php
    if(count($errors) > 0)
    {
    ?>

    <?php
            } }
    ?> 

I need to fix this please any idea about them?

</div>

Answer 1

It seems that due to your logic, $loggedInUser is not initialized properly. "non-object" in that case means that it is either null or not an object (i.e. it is a string or a number ...).

Try to change:

function isUserLoggedIn()
{
    global $loggedInUser,$db,$db_table_prefix;

    if ( !isset($loggedInUser) || !isset($db) || !isset($db_table_prefix) )
    {
         throw new Exception "Objects and/or globals not initialized.";
    }

    $sql = "SELECT user_id,
    .....

This will terminate your script if things are going wrong. Since the rest of code is missing, it's almost impossible to tell where exactly the problem resides.

To your second Q: this seems not to be the proper code since there is no array reference with an index 'status'