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@Renaissance Yes I changed the signature key recently. Basically created fresh for one client and this is not working since then and key looks ok.

@Renaissance  Can you provide me those 2 different sets of code?

@Renaissance look at the values that I got in reponse from $_POST - https://stackoverflow.com/questions/56983842/authorize-net-sha512-hash-validation-issue?noredirect=1#comment100545271_56983842My code was working before.I have searched alot about th...

@Renaissance I have used it outside hash function by assigning in a variable.I Put the code here so that number of lines does not exceeds same is present on https://stackoverflow.com/questions/56983842/authorize-net-sha512-hash-validation-issue

Please help me out - I am getting different hash after payment is done usin Authorizenet DPM. It was working before but from last1-2 days it is not working. I am using following function to generate Fingerprint for x_hp_hash -$signature_key = hex2bin...