How does the behavior of object IDs and object reassignment in PHP impact memory management and object instantiation?

When object IDs are reassigned in PHP, it can lead to memory leaks and inefficient memory management as the original object may not be properly deallocated. To avoid this issue, it is important to unset the original object before reassigning the ID to a new object. This ensures that the memory used by the original object is properly released before assigning a new object to the same ID.

// Create a new object
$obj1 = new MyClass();

// Unset the original object before reassigning the ID
unset($obj1);

// Create a new object and assign it to the same ID
$obj1 = new MyClass();