We have a custom coded website written in older PHP language (pre-2010). Our server host is 1and1.com, and we pay for an extended support for older PHP syntax. Last week, part of our website stopped working all of the sudden. There are web screens that require inputs from students, and when the students attempt to save their inputs, it is not saving. The desired behavior for this website is that the changes the students make will be saved and sent to the server. No error messages are displayed when these actions fail.

We have contacted the server host to inquire about any changes of any kind made to our server- they deny it. We had made no changes to our code at that time. We have scoured through numerous files trying to determine what the "coding" issue may be to no avail. We uploaded our backup from the previous week (which was functioning correctly at that time), and it still doesn't work.

We keep circling back to the server host as the source of the issue. Does this sound like a server-side issue, and if so, what questions should we be asking? If not, can you point us to any websites/individuals that could help fix this issue? Thanks.