How can server configurations, such as using the IIS with PHP, impact file download functionality in PHP scripts?

Server configurations, such as using the IIS with PHP, can impact file download functionality in PHP scripts by causing issues with headers being sent incorrectly. To solve this issue, you can use the `readfile()` function in PHP to send the file to the browser with the correct headers. 

$file = 'path/to/file.pdf';

header('Content-Description: File Transfer');
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename=' . basename($file));
header('Content-Length: ' . filesize($file));
readfile($file);
exit;

Keywords

server configurations IIS PHP file download scripts

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