What are the differences in page reloading behavior between browsers like Opera, IE, and Firefox when using PHP?

When using PHP, browsers like Opera, IE, and Firefox may exhibit different page reloading behavior due to caching mechanisms. To ensure consistent page reloading across browsers, you can use PHP headers to control caching behavior and force the browser to reload the page each time. 

<?php
header("Cache-Control: no-cache, must-revalidate"); // HTTP 1.1
header("Pragma: no-cache"); // HTTP 1.0
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
?>

Keywords

PHP page reloading browsers Opera IE Firefox

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