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I'm currently working about equally in PHP and Java. I can't say I've fallen in love with Java. But Java does have a feature or two that would be useful in PHP. One of them is the Enum (enumeration, that is), which is traditional in some languages and DBMSes (including MySQL) and was introduced in Java 1.5 (or is that 5.0? I'm sure they do that just to expose people like me as Java amateurs).