How can implicit flush affect the execution of PHP scripts that use header("location: index.php")?

Implicit flush can cause issues when using header("location: index.php") because any output before the header redirect can prevent the redirection from happening. To solve this issue, you can use ob_start() at the beginning of the script to buffer the output and prevent it from being sent to the browser prematurely. 

<?php
ob_start();
// Your PHP code here

// Redirect to index.php
header("Location: index.php");
exit();
?>

Keywords

implicit flush PHP scripts header function location redirect execution timing

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