Cookies must be enabled to log in. PHP uses cookies to implement visit statistics code.

[/code]
global $count;
$count=1;
if(!isset($_COOKIE["visittime"])){ setcookie("visittime",date("y-m-d H:i: s"));
setcookie("visitcount",1); echo "Welcome to your first visit to the website!";
}
else{
setcookie("visittime",date("y-m-d,H:i:s" ),time()+60); $count=$_COOKIE['visitcount']+1;
setcookie("visitcount",$count); echo "The time you last visited the website was:".$_COOKIE[' visittime'];
echo "
";
}
echo "The time you visited the website ".$_COOKIE['visitcount']." is:".date("y-m-d H:i:s") ;
?>
[/code]

The above has introduced that cookies must be enabled to log in. PHP uses cookies to implement access statistics code, including the content that cookies must be enabled to log in. I hope it will be helpful to friends who are interested in PHP tutorials.