How can different header() types be executed sequentially in PHP?

To execute different header() types sequentially in PHP, you can simply call each header() function one after the other in the order you want them to be executed. Each header() call will set the corresponding HTTP header for the response. Make sure to call header() functions before any output is sent to the browser to avoid any errors. 

<?php
header('Content-Type: text/html');
header('Cache-Control: no-cache, no-store, must-revalidate');
header('Pragma: no-cache');
header('Expires: 0');
?>

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header() PHP execution sequential types

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