Question

Should I always unset objects after using them? Consider the following code.

foreach ( $items as $item_id )
{
    $item = new Item($item_id);
    echo $item->name;
    unset( $item ); 
}

Is it advisable to use unset() this way? Are there better techniques to free up memory after using objects?

Answer 1

In your case, no. Everytime $item is replace the old value is destroyed. The last value of $item will remain allocated, but if your code is well structured you’ll be using functions and when $item goes out of scope it will finally be destroyed.