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Answers and rating deltas for

How can i get the value of previous url in php code?

Author Votes Δ
Sky 1 +3.70
Vijay Verma 0 +0.04
mseifert 0 -0.20
YesItsMe 0 -1.23
Muarif 0 -1.21
Last visited: Jan 2, 2016, 9:33:37 AM