At the end of the script the interpreter frees the memory. Actually every object has a built-in destructor, just like it has built-in constructor. So even we don't define it explicitly, the object has its destructor. Usually this destructor is executed at the end of the script, or whenever the object isn't needed anymore. This can happen, for instance, at the end of a function body. Now if we call the destructor explicitly, which as I said I've seen many times, here's what happen. As you can see calling the destructor explicitly doesn't destroy the object. So the question is...how to destroy an object before the script stops?

He points out that one way to "destroy" an object is to null it out and remove the structure from memory. This is tricky, though, because a clone of the object will still exist in memory, just not the original.

The options were:

• Using MySQL directly
• Not using auto-increment functionality
• Using multiple databases
• Not using relations
• The n+1 pattern

Be sure to vote in this week's poll that asks "Which is Truest?" - given several popular opinions on PHP, pick the one that you think is the most true.