为什么Eclipse中的'true'和'TRUE'用于PHP？

Question

The Eclipse 'intellisense' for some methods in PHP files suggests true, looking like the PHP boolean literal, but for other methods suggests TRUE, which looks like a constant defined somewhere. What causes this?

Answer 1

I'm not sure what causes it, but both are equivalent. According to the PHP docs:

To specify a boolean literal, use the keywords TRUE or FALSE. Both are case-insensitive.

Were I to hazard a guess as to the cause, I would think it is just due to many additions to the Eclipse's 'Intellisense' over the years, with various programmers using their own personal preference.

If you want to follow the PSR-2 standard, they must be in lower case.