“Trying to get properties on a non-object” in PHP

Question

I\'m a WordPress theme developer and on a theme I\'m working on, I\'ve turned on debug mode and get this error inside a select drop-down box for the theme\'s options page. <

Answer 1

OK I see what you're saying. Earlier in my code I have this (overly simplified, just to show the important parts):

$news_categories = get_categories()  //pulls all of the categories from WordPress

        array ("minititle"      => '<span class="mini_title">Select the category you\'d like to use as your "Top Story" category.</span>',
            "id"        => $shortname . "_top_story_category",
            "type"      => "cat_select",
            "options" => $news_categories)

This is where $value['options'] comes from. The code is part of a switch statement...

I would have to post the entire file in order to give the context, and it's quite long.

Answer 2

It would seem that $option is an array. Try:

$option['term_id']

Answer 3

You're doing this a couple of times:

$option->someproperty

In at least one of the cases $option is not an object. When you then do -> on a non-object, you get that error.

First, verify that $option is actually an object and correct the usage if it is not.

If $option is an array then @matthewpavkov is correct, you should do $option['someproperty'] instead of $option->someproperty.

If $option is usually an object, perhaps get_categories() is sometimes returning null or false in a failure condition. Check for that before accessing $option.

Like so:

foreach ($value['options'] as $option)
{
    if ($option)
    {
        // do whatever;
    }
}

Answer 4

Execute it from action...i.e.:

function your_function(){
    YOUR CODES HEREEEEEEEEEEE............
}
ADD_ACTION('init','your_function');