How can one ensure that no data is output before generating a PDF file in PHP?

To ensure that no data is output before generating a PDF file in PHP, you can use output buffering to capture any output and prevent it from being sent to the browser. This can be achieved by using the ob_start() function before any output is generated and then using ob_end_clean() to discard the buffered output before sending the PDF file. 

<?php
ob_start();

// Generate PDF file here

ob_end_clean();

Keywords

output buffering ob_start ob_end_clean PDF generation TCPDF

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