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Answers and rating deltas for

Why am I receiving a notice string offset in this php code?

Author Votes Δ
sergio 1 +1.92
Code Lღver 1 +0.83
Amal Murali 1 +0.17
Mahmood Rehman 0 -1.24
Last visited: Sep 14, 2014, 5:07:29 AM