CSV export in laravel 5 controller
Stefan Izdrail
Founder & Senior Architect · 2026-06-29
Title: Troubleshooting CSV Export Issues in Laravel 5 Controllers
Introduction:
When working on web applications, exporting data to different formats is an essential functionality. One of the most common formats for data exchange is comma-separated values (CSV). However, sometimes you might encounter issues during CSV export in a Laravel controller. This blog post aims to guide you through some potential pitfalls and provide solutions to ensure successful exporting of data in your Laravel 5 applications.
Issue Analysis:
Based on the provided code snippet, there is a possibility that the issue might be related to missing content-type headers or additional configuration for downloading the CSV file. Let's analyze this further:
1. Missing content type headers: The header("Content-type: text/csv") line ensures that your application sends the correct MIME (Multipurpose Internet Mail Extension) type to the browser to indicate that it is sending a CSV file. Be sure to include this line at the beginning of your controller function before setting other headers.
2. Missing content disposition: The header("Content-Disposition: attachment; filename=file.csv") line helps instruct browsers on how to handle the response. Adding "attachment" as a value tells them to download and save the CSV file instead of displaying it in the browser window.
3. Pragma and Expires headers: The header("Pragma: no-cache") and header("Expires: 0") lines help prevent caching issues. By setting these headers, you ensure that your application does not unintentionally cache the CSV file or cause unexpected behavior when downloading.
4. Using correct file resource handler: The fopen() function in the code snippet should be updated to use "php://output" as the first argument instead of specifying a file name directly. This provides a temporary file resource that ensures the CSV data is written to the output stream and not stored on your server's filesystem, thus avoiding potential issues with server access or permissions.
Solution:
Now that we have identified the possible causes for the issue, let's update the code accordingly:
public function export()
{
header("Content-type: text/csv");
header("Pragma: no-cache");
header("Expires: 0");
header("Content-Disposition: attachment; filename=file.csv");
$reviews = Reviews::getReviewExport($this->hw->healthwatchID)->get();
$columns = array('ReviewID', 'Provider', 'Title', 'Review', 'Location', 'Created', 'Anonymous', 'Escalate', 'Rating', 'Name');
$file = fopen('php://output', 'w');
fputcsv($file, $columns);
foreach($reviews as $review) {
fputcsv($file, array($review->reviewID,$review->provider,$review->title,$review->review,$review->location,$review->review_created,$review->anon,$review->escalate,$review->rating,$review->name));
}
exit();
}