Search results for: "$_COOKIE"

What is the difference between using $_COOKIE['userid'] = ""; and setcookie("Cookiename","", 0, "", "URL") to clear cookies in PHP?

When clearing cookies in PHP, using $_COOKIE['userid'] = ""; only clears the cookie value in the current script execution, but the cookie still exists...

What are the best practices for setting and retrieving cookies in PHP using $_COOKIE and setcookie()?

When setting and retrieving cookies in PHP, it is important to use the $_COOKIE superglobal array to access cookies that have already been set, and th...

Why is it recommended to use superglobal variables like $_POST, $_GET, $_SESSION, and $_COOKIE in PHP scripts?

Using superglobal variables like $_POST, $_GET, $_SESSION, and $_COOKIE in PHP scripts is recommended because they provide a secure way to access user...

Are there specific security concerns related to using global variables like $_POST, $_GET, and $_COOKIE in PHP, and how can these be mitigated?

Using global variables like $_POST, $_GET, and $_COOKIE in PHP can pose security risks such as injection attacks or data manipulation. To mitigate the...

What considerations should be made for the data stored in cookies in PHP, and how does it affect their availability in $_COOKIE?

When storing data in cookies in PHP, it's important to consider the size limitations of cookies (usually around 4KB) and the security implications of...