How to use HTTP Headers in PHP
PHP lets us set the HTTP headers of a response through the header() function.
HTTP Headers are a way to send information back to the browser.
We can say the page generates a 500 Internal Server Error:
<?php
header('HTTP/1.1 500 Internal Server Error');
?>Now you should see the status if you access the page with the Browser Developer Tools open:
We can set the content/type of a response:
header('Content-Type: text/json');We can force a 301 redirect:
header('HTTP/1.1 301 Moved Permanently');
header('Location: https://flaviocopes.com');We can use headers to say to the browser “cache this page”, “don’t cache this page”, and a lot more!
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