brandoncluff brandoncluff - 7 months ago 13
PHP Question

PHP - Streaming CSV Files to Browser

I'm having issues getting CSV files to download directly to my browser without storing the files somewhere on my server. I found a tutorial (https://www.perpetual-beta.org/weblog/php-stream-file-direct.html) but I can't seem to get it working!

This is my main function:

public function exportRecord($id) {
$contest = (string) $this->getContest($id);
$entries = (array) $this->getEntries($id);

$filename = sprintf('%1$s-%2$s-%3$s', str_replace(' ', '', $contest['name']), date('Ymd'), date('His'));
$output = fopen('php://output', 'w');

ob_start();

$header = array(
'First Name',
'Last Name',
'Address',
'City',
'State',
'Zip',
'Phone',
'Email',
'Item Purchased',
'Partner Name',
'Partner #',
'Date Entered',
'Subscribe'
);

fputcsv($output, $header);

foreach ($entries as $entry) {
fputcsv($output, $entry);
}

$string = ob_get_clean();

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');

exit($string);
}


I am calling the following two functions, which just do queries on my database...

private function getContest($id) {
$query = sprintf(
'SELECT name ' .
'FROM contests ' .
'WHERE id = %s;',
$id
);

$result = $this->mysql->query($query);
$response = '';

if ($result) {
while ($row = mysqli_fetch_assoc($result)) {
$response = $row;
}
} else {
echo $this->mysql->error;
}

return $response;
}

private function getEntries($id) {
$query = sprintf(
'SELECT firstName, ' .
'lastName, ' .
'CONCAT(address1, ", ", address2), ' .
'city, ' .
'state, ' .
'zip, ' .
'phone, ' .
'email, ' .
'itemPurchased, ' .
'partnerName, ' .
'partnerNum, ' .
'dateEntered, ' .
'subscribe ' .
'FROM entries ' .
'WHERE contestID = %s;',
$id
);

$result = $this->mysql->query($query);
$response = '';

if ($result) {
while ($row = mysqli_fetch_assoc($result)) {
$response[] = $row;
}
} else {
echo $this->mysql->error;
}

return $response;
}


I appreciate any help/advice that you'll give! Here is a screenshot, just to give you an idea of what the issue is:
Screenshot
Thank you!

Answer

I ended up doing this with JS.

                    } else if (action == 'export') {
                    if (result.data !== false) {
                        var data = encodeURIComponent(result.data);
                        var contest = result.contest.trim();
                        var filename = contest + '.csv';
                        var dataUri = 'data:text/csv;charset=utf-8,' + data;
                        var link = document.createElement('a');

                        link.setAttribute('href', dataUri);
                        link.setAttribute('download', filename);
                        document.body.appendChild(link);
                        link.click();

                        showMessage('Export successfully created!', 'success');
                    } else {
                        showMessage('There are no entries for this contest! Nothing to export...', 'error');
                    }
                }