How can output to the browser be prevented before using the header function for page reloading in PHP?

To prevent output to the browser before using the header function for page reloading in PHP, you can use output buffering. Output buffering allows you to store the output in a buffer before sending it to the browser, which can help avoid header errors due to output being sent before headers. You can start output buffering using ob_start() at the beginning of your PHP script. 

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

// Your PHP code here

header("Location: newpage.php"); // Redirect to a new page

ob_end_flush(); // Flush the output buffer and send the output to the browser
exit; // Ensure no further output is sent after the header redirect
?>

Keywords

output buffering ob_start header function page reloading PHP

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