What is the best practice for checking if a cookie exists in PHP?

To check if a cookie exists in PHP, you can use the isset() function to determine if the cookie variable is set. This function returns true if the cookie exists and false if it does not. By using isset(), you can easily check for the presence of a specific cookie in your PHP code. 

if(isset($_COOKIE['cookie_name'])) {
    // Cookie exists
    echo 'Cookie exists!';
} else {
    // Cookie does not exist
    echo 'Cookie does not exist.';
}

Keywords

PHP cookie isset $_COOKIE validation

Related Questions