How can the order of code execution affect the effectiveness of the header function in PHP for browser redirection?

The order of code execution can affect the effectiveness of the header function in PHP for browser redirection because headers must be sent before any other output is sent to the browser. If there is any output before the header function is called, it will result in a "headers already sent" error. To solve this issue, make sure to call the header function before any other output is generated in the PHP script. 

<?php
// Make sure to call the header function before any other output
header("Location: https://www.example.com");
exit;
?>

Keywords

code execution header function PHP browser redirection effectiveness

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