- fputcsv: documentation ( source)
- stream_get_contents: documentation ( source)
- fclose: documentation ( source)
- rewind: documentation ( source)
- tmpfile: documentation ( source)
<?php
$csv = tmpfile();
fputcsv($csv, ['foo', 'bar', 'baz'], '💩');
rewind($csv);
echo stream_get_contents($csv);
fclose($csv);