What is the misconception regarding references in PHP and how does it differ from the actual behavior?

Misconception: Many developers believe that passing variables by reference in PHP is necessary to modify the original variable outside of a function. However, PHP automatically passes objects by reference, so there is no need to explicitly pass them as references. Actual behavior: PHP automatically passes objects by reference, so modifying an object inside a function will reflect those changes outside of the function without explicitly passing it by reference.

// Misconception: Passing by reference
function increment(&$num) {
    $num++;
}

$value = 5;
increment($value);
echo $value; // Output: 6

// Actual behavior: Objects are passed by reference by default
class MyClass {
    public $value;
}

$obj = new MyClass();
$obj->value = 5;

function incrementObject($object) {
    $object->value++;
}

incrementObject($obj);
echo $obj->value; // Output: 6