- fputcsv: documentation ( source)
- fopen: documentation ( source)
<?php
$fh = fopen('php://stdout', 'w');
fputcsv($fh, ['using default', 'a,"b'], ',', '"');
fputcsv($fh, ['using " ', 'a,"b'], ',', '"', '"');
fputcsv($fh, ['using x ', 'a,"b'], ',', '"', 'x');
fputcsv($fh, ['using \\ ', 'a,"b'], ',', '"', '\\');