Error: Trying to get property of non-object

Question

I'm getting an error:

Trying to get property of non-object on line 30

On the commented line below...

function admin_trim_category_description( $terms, $taxonomies ){
    if( 'category' != $taxonomies[0] ) return $terms;
    $my_categories = array('item1','item2','item3');
    foreach( $terms as $key => $term)
        if(in_array(
            $terms[$key]->name, //ERROR LINE HERE
            $my_categories)) 
            {
                unset($terms[$key]);   
            }
    }

What am I doing wrong?

Answer 1

$terms[$key] seems not to be an object. I'd suggest you to check whatever it is an object or not with:

if (is_object($terms[$key])) { /* OK */ }

and/or check whatever the object is an instance of a specific class with:

if ($terms[$key] instanceof MyClass) { /* OK */ }