php - Call to a member function on a non-object

So I'm refactoring my code to implement more OOP. I set
up a class to hold page
attributes.

class PageAtrributes
            
{
 private $db_connection;
 private
            $page_title;

 public function __construct($db_connection)
            
 {
 $this->db_connection = $db_connection;


            $this->page_title = '';
 }

 public function
            get_page_title()
 {
 return $this->page_title;

            }

 public function set_page_title($page_title)

            {

 $this->page_title = $page_title;

            }
}

Later on
I call the set_page_title() function like
so

function
            page_properties($objPortal) { 

            $objPage->set_page_title($myrow['title']);
}

When
I do I receive the error
message:

Call to a
member function set_page_title() on a
non-object

So what
am I missing?

itemprop="text">

class="normal">Answer

It means that
$objPage is not an instance of an object. Can we see the code
you used to initialize the variable?

As you
expect a specific object type, you can also make use of href="http://php.net/manual/en/functions.arguments.php#functions.arguments.type-declaration"
rel="noreferrer">PHPs type-hinting
feature^Docs to get the error when
your logic is violated:

function
            page_properties(PageAtrributes $objPortal) { 
 ...

            $objPage->set_page_title($myrow['title']);
}

This
function will only accept PageAtrributes for the first
parameter.