update to 0.17.0 broke several rpc api calls that worked under 0.16.3, how to migrate correcty my code?
The first issue, with getbalance, is a known issue which will be fixed in the next release. You can see the pull request for it here: https://github.com/bitcoin/bitcoin/pull/14602

The latter, though, I cannot seem to replicate. To my knowledge, listunspent has not been modified in version 0.17, and it seems to work as expected when I test on the command line. Did it work before? Perhaps PHP is causing the issue, could you try enclosing the number as a string instead just to test it? "minimumAmount" =&gt; "0.00005"