Simple Regex validation issue

Question

I'm usually pretty decent at regex but this basic one has me stumped.

  preg_match('/^(\+|-)\s+(month|week|year|day)$/i', '-1 month');

This is returning 0. Can anyone tell me why? It seems to be breaking on the \s.

Note: I have tried escaping the -.

When this happens to me... I just go to bed and solve the problem the next day. doesn't matter if it's 11:55AM. Go to bed! — Garis M Suero
– Garis M Suero, Commented Apr 28, 2015 at 15:55

AbraCadaver · Accepted Answer · 2015-04-28 15:52:51Z

3

You didn't account for digits:

preg_match('/^(\+|-)\d+\s+(month|week|year|day)$/i', '-1 month');

answered Apr 28, 2015 at 15:52

AbraCadaver

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