Bug Fix for bug 4063. #97

This is a bug fix for 4063. "Notice: Array to string conversion" when downloading CSV or TSV files from Visitor Log in 1.12.

Some custom variables are in the $csv array as arrays themselves. Line 283 was trying to handle this array as a string and was throwing the error. This fix parses the array into a string prior to the string formatting step. The csv will successfully download with this fix. Tested on PHP 5.4.13.

Pull request for master.

The bug is reproducible with a clean install and generated data using the plugin. The route is address to get the bug is:

index.php?module=API&method=Live.getLastVisitsDetails&format=CSV&idSite=1&period=day&date=yesterday&expanded=1&translateColumnNames=1&language=en&filter_limit=100

I can reproduce w/ php 5.4 & php 5.5. Regarding your changes:

• Your code assumes formatValue will only be called w/ custom variables in the Live.getLastVisitsDetails report. This may be the case now but it is not guaranteed to always be the case. A more durable solution that handles any array is required or Live.getLastVisitsDetails needs to be customized for this specific use case.
• Can you add an integration test for this? Adding a test for Live.getLastVisitsDetails to CsvExportTest.php should do the trick, I think.

Fixed in 1510afcf0467d7736bbbd197a15722c8a7b65b27.