How can PHP see client side cookies? -

how can php see client side cookies?

to elaborate: when working php & javascript, understand php gets processed on server side. while javascript happens on client side.

in javascript can check , set these client cookies. makes sense.

however, php, if check client cookie value part of conditional statement sets , how php able see clients cookie value while php happening on server side?

here's example of php conditional lives in php file:

<?php if ($_cookie["name"] == “mickey”) {     setcookie(“fulsome”, “mickey mouse”, time()+3600);   } ?> 

there no such thing client side cookie.

a cookie piece of data associated set of urls in browser. every time browser makes http request 1 of urls, cookie included in request headers.

they designed set via http response headers.

an api added browsers allows them created , set javascript. these still regular cookies though , included in every request associated urls.

it possible mark cookie http_only cause browsers prevent access cookie javascript. there no direct equivalent imposing similar limit going other way. closest come use local storage instead of cookies.