To say that using "\z" is "the correct regex solution" (and imply that using "$" is "incorrect") is a bit silly, esp. in the absence of more detailed info regarding the application.

There are some situations where the two solutions will have different behaviors, and in such cases, it's up to the programmer to decide which is more appropriate. Either one could be more useful (or "correct") than the other, depending on the task. But in many common situations, they behave the same, and neither is "more correct" than the other.

In reply to Re^3: Quicker way to do this IF statement 1-5 by graff
in thread Quicker way to do this IF statement 1-5 by Anonymous Monk

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