Divide md5 function with colon (:) [closed]

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How can I divide a md5 function with a colon?

Currently I have this:

$ms = md5($transactionid:$secretkey);

But that code is invalid.

I can divide it with a "." but not a ":"?

Answer 1

$ms = md5($transactionid.':'.$secretkey);

You need to concatenate with .