setcookie命令不起作用

I use this command to set a cookie in my project

setcookie("userstate",$loginusername);

but it does not run I also use

echo setcookie("userstate",$loginusername);

but it dose not work too

I use netbeans and this command is recognized in it but it is not work what is the solution?

You set a cookie using setcookie("cookie_name", $value);, so you've got that right. You access a cookie, using the superglobal variable $_COOKIE. It's an associative array, and you can use it like this:

setcookie("userstate", $loginusername);
echo $_COOKIE["userstate"];