What role do caching proxy servers play in potentially causing display issues with websites like php.net and how can this be mitigated?

Caching proxy servers can cause display issues with websites like php.net by serving outdated content to users. This can be mitigated by implementing proper cache control headers in the server response, instructing proxy servers not to cache certain resources. 

<?php
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
?>

Keywords

caching proxy servers display issues php.net mitigation strategies website performance

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