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I want to convert alphabets to numbers, in this way: A=0, B=1, C=2... Z=25 using php

Author Votes Δ
Uri Goren 3 +1.40
Eko Junaidi Salam 1 +0.14
Ayesh K 0 -1.42
Last visited: Jan 2, 2016, 5:41:52 PM