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Answers and rating deltas for
PHP - What Regex should I use to validate an input to be either empty or 4 digits?
| Author | Votes | Δ |
|---|---|---|
| Wiktor Stribiżew | 1 | +0.21 |
| Asheesh | 0 | -0.82 |
| Sumit Kumar | 0 | -0.84 |
Last visited: Aug 26, 2016, 2:34:25 PM