PHP Get object indentifier

Hopefully this is an easy one for someone. Basically I have a bunch of SQLite3Result objects that store cached data inside a class. I need to be able to reference this data when a method is called with the result as an argument. I thought it would be best to just keep the cache in an array where the key is a unique identifier for the result object.

So, is there anyway to get a unique indentifier for an object? Like the addressof() function in 'other' languages. 开发者_如何学GoI just need something so that when subsequent calls to a method with the result as an argument I can look up cached data based on that result.

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Since your cached data is represented by your SQLite results, you could use their primary key identifiers as identifiers for your caches.

A PHP OOP-based alternative is spl_object_hash(), but this creates a hash for every unique object even if multiple data objects are referenced by the same database row.