CSV-Export
<?php
header("Content-Type: text/csv");
header("Content-Disposition: attachment; filename=daten.csv");
$output = fopen("php://output", "w");
fputcsv($output, ["ID", "Name", "Email"]);
// Beispiel-Daten
$data = [[1,"Max","max@mail.de"], [2,"Anna","anna@mail.de"]];
foreach($data as $row) fputcsv($output, $row);
fclose($output);
exit;
?>