Hi, I have Nextcloud up and running on an early Pi 3. Operating system is jessie Nextcloud is . My setup is using an external hard disks and is currently holding about 350GB of data.
I have noted that Nextcloud 14 will not run with PHP 5. Thus I need to update to stretch and PHP 7.
I am not familiar with the implications of making these upgrades.
I have previously updated other machines to stretch – I guess this would have limited implications.
PHP 7 on the other hand is out of my league and I cannot find anything which gives an idea how to make that upgrade. Is anybody able to help (specifically in relation to Nextcloud and the Raspberry Pi).
Any assistance will be greatly appreciated.

An example of a database abstraction layer on the language level would be ODBC . ODBC is a platform-independent implementation of a database abstraction layer. The user installs specific driver-software, through which ODBC can communicate with a database or set of databases. The user then has the ability to have programs communicate with ODBC, which then relays the results back and forth between the user programs and the database. The downside of this abstraction level is the increased overhead to transform statements into constructs understood by the target database.

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