I don't see a difference between a "fatal error call to undefined function" and or a parse error. It can go without problem in 5.3.
Ah, there is a difference - you can do function_exists to check for a function, but you can do nothing if your file doesn't parse.
<<< was never obvious, there is no obvious string to use in this case (not obvious for everyone and his mother).
Perl does <<FOO and <<'FOO' and I think in this case difference is more clear. I'm not sure this is the way, but it can be an option. Everybody is welcome to propose - maybe it will be as much fun as the namespace separator thread ;)
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