Please how do i correct this error

[dozzy]

Please how do i correct the error on line 117 in the functions.php file of this document. https://www.libertyreserve.com/downl...asspay-2.1.zip , due to mhash being obsolete to hash

[milomir]

replace

mhash(MHASH_SHA256, $authString)

with

hash("sha256", $authString)