Отдаем CSV файл в браузер

<?php
function export_csv($data) {
 // No point in creating the export file on the file-system. We'll stream
 // it straight to the browser. Much nicer.
// Open the output stream
 $fh = fopen('php://output', 'w');
// Start output buffering (to capture stream contents)
 ob_start();
// CSV Header
 $header = array('Field 1', 'Field 2', 'Field 3', 'Field 4', 'Field 5', 'Etc...');
 fputcsv($fh, $header);
// CSV Data
 foreach ($data as $k => $v) {
 $line = array($data['field_1'], $data['field_2'], $data['field_3'], $data['field_4'], $data['field_5'], $data['field_etc']);
 fputcsv($fh, $line);
 }
// Get the contents of the output buffer
 $string = ob_get_clean();
// Set the filename of the download
 $filename = 'my_csv_' . date('Ymd') .'-' . date('His');
// Output CSV-specific headers
 header('Pragma: public');
 header('Expires: 0');
 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
 header('Cache-Control: private', false);
 header('Content-Type: application/octet-stream');
 header('Content-Disposition: attachment; filename="' . $filename . '.csv";');
 header('Content-Transfer-Encoding: binary');
// Stream the CSV data
 exit($string);
}
?>