What are the best practices for passing objects to functions or methods in PHP to avoid errors like "Call to a member function on a non-object"?

When passing objects to functions or methods in PHP, it is important to ensure that the object being passed is indeed an object and not null or another data type. To avoid errors like "Call to a member function on a non-object", you should always check if the object is not null before attempting to call a method on it. This can be done using conditional statements to validate the object before proceeding with any method calls.

// Check if the object is not null before calling a method on it
function myFunction($object) {
    if($object instanceof MyClass) {
        $object->myMethod();
    } else {
        // Handle the case where the object is not of the expected type
        echo "Error: Object is not of the expected type.";
    }
}

// Example usage
$myObject = new MyClass();
myFunction($myObject);