Does _COOKIE only have cookies for the current request

Question

What the _COOKIE variable contains. Does it contain only a cookie that is sent by the browser for the current request?

Answer 1

It is right!

$_COOKIE

The value of $ _COOKIE is determined by the expression the contents of the cookies received in the user agent request.

Answer 2

The contents of the superglobal variable $ _COOKIE:

When retrieving cookies with PHP using the superglobal $ _ COOKIE associative array of variables passed to the current script via HTTP cookies.

To check all cookie variables, just use:

 print_r($_COOKIE); 

To get the value of a specific cookie variable, specify the cookie variable key:

 echo $_COOKIE["myVariableName"]; 

The hardest part about getting cookies with PHP is that the cookie variable will not be available until the request is set. Therefore, you cannot access the cookie with PHP until the following page loads :

 // Cannot have output before setting cookies. // Cookie will be sent along w the rest of the HTTP headers. setcookie("name", "Pat"); // If the above was the first time "name" was set, // this will echo NOTHING!!! echo $_COOKIE["name"]; // You will only be able to retrieve $_COOKIE["name"] after the // next page load. 

Answer 3

To a large extent on the point ...

Mostly you use $_COOKIE to get the data stored in cookies from the browser.

Of course, cookies are not always very reliable, because they can be disabled by the client , but nevertheless are widely used.