Checkout button has disappeared since php version was changed by host. Is this a related issue? Suggestions?

https://micounties.org/events/regDonateMACPAC.php After filling out the form and clicking on donate now button, it takes you to a page with your information and a checkout button to enter the payment gateway (authorize.net). The database is collecting info all right, but the Checkout Button has disappeared. I reuploaded a original copy of the page, didn't work. The last working donation was Sept. 26. On Oct. 3 the php version was set back to 5.3 because the client's wordpress blog page (the rest of the site is in DreamWeaver) was skewed following InMotion Hosting's recent update to a newer php without our knowing. That took weeks to figure out what the issue was. Now this! Any clue?

on viewing source of the confirm page, i see the following error:

<b>Fatal error</b>: Call to undefined function mhash() in <b>/home/comput42/public_html/testdev/WA_eCart/checkoutScripts/WA_simlib.php</b> on line <b>30</b><br />


sounds like your php server does not have the mhash library enabled.

try changing the WA_eCart/checkoutScripts/WA_simlib.php file to use the hash function instead.

change:
return (bin2hex (mhash(MHASH_MD5, $data, $key)));


to:
return (bin2hex (hash(MHASH_MD5, $data, $key)));

Thanks, Jason. Worked like a charm.

Glad to hear it is working.

Oops. Should have continued with a test. Still not working. The checkout button appears but it returns an error with this URL:
https://secure.authorize.net/gateway/transact.dll
The following errors have occurred.
(103) This transaction cannot be accepted.

What I’ve tried:
Changing the php version to 5.2 (was 5.3) Host company says that’s how to get mhash enabled but checkout button still doesn’t show up unless I do what you suggested below.
changing the WA_eCart/checkoutScripts/WA_simlib.php file to use the hash function instead.
change:
return (bin2hex (mhash(MHASH_MD5, $data, $key)));
to:
return (bin2hex (hash(MHASH_MD5, $data, $key)));

Should I also change that MHASH to HASH?
Or is there something about enabling mhash that the host company isn't getting right?

See PM

See PM

Glad to hear you got things working.