What are the best practices for handling database queries and Excel file generation in PHP to avoid header conflicts?

When handling database queries and generating Excel files in PHP, it's crucial to ensure that there are no conflicts with headers being sent. To avoid this issue, you can use output buffering to capture the output before sending any headers. This way, you can manipulate the data and generate the Excel file without encountering any header conflicts. 

<?php
ob_start(); // Start output buffering

// Your database queries and Excel file generation code here

// Set the appropriate headers for Excel file download
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment; filename="excel_file.xls"');

ob_end_flush(); // Flush the output buffer and send the Excel file to the browser
exit();
?>

Keywords

database queries Excel file generation PHP header conflicts best practices

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