StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
PHP: How to know if a variable exist, event if his value is NULL?
| Author | Votes | Δ |
|---|---|---|
| Dmytro Shevchenko | 6 | +5.48 |
| Paul Dixon | 2 | -0.68 |
Last visited: Sep 14, 2014, 5:07:29 AM