I want to quickly help

Now i am upgrading my php version 5.4 to 7.1 in oscommerce.
But i have some problems.
When i use php 5.4 , order.php is running very well and cmcic_response.php is too.
But now it isn’t running well.
In php 5.4, pdf file is created but now it doesn’t .
Please help me…

Is the version of oscommerce that you are using compatible with php 7.1?
Do you need to migrate to a new version of oscommerce that supports php 7.1?

Just switching from php 5.4 to 7.1 is likely to result in problems. You should typically test this first locally before actually upgrading the production environment. It sounds like you just switched to php 7.1 on production without testing first in a lower environment which would be a huge mistake. PDF file not being created sounds like an extension might be missing but difficult to say for sure.

Oscommerce is a large platform. Its highly unlikely anyone is going to be able to help without more details. Just saying things broke is not enough to diagnose a problem like this. I would start with checking compatibility between the version of oscommerce you are using and php 7.1.

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Thank for reply.
Yeah, some functions is running well.
But any functions is n’t running such as create pdf file and payment …
So i can’t see error and i don’t now why this happen.

You didn’t answer any of my questions.

What version of oscommerce are you using? The payment process would be part of oscommerce. Therefore, I suspect the version of oscommerce you are using isn’t compatible with php7 or might be missing extensions. Its impossible to say for sure without knowing more information about the specific environment.

Thank for reply.
After hear your opinions ,i checked my code very carefully and then i have modified a lot of problems.
But now i have one problem, when i pay, i can’t receive my mail.
It is blocked on chechout_process.php.
I will wait your kindly response.

Hello all ,
I need your help…
Now i am migration oscommerce from php 5.3 to 7.1.
But i have some problems, some functions don’t run well.
I would like to somebody help me how to do that step by step…

The OSCommerce project was abandoned in 2017. There seems to be a lot of pending issues related to running it on 7.x, However, there does look to be a community version that is being supported.

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