override type choosing or compare two floats in php

So basically, i'm getting two really really big ID's from different resources (external resource and database), and I need to compare them somehow. If they match, I need to break the action.

Seems simple enough, but PHP is converting them to floats (looks开发者_StackOverflow something like that 6.2983963148698E+14) and they never seem to match then.

What should I do? I tried googling for some type of a big integer in PHP, or casting them as strings. That did not work.

Bare in mind, I'm not really experienced at this.

Thanks for your help.

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Have you tried the BC Math functions?