How to make delete cookies button ?

[Max45]

Hi

I have made this simple login page by setcookies function and I want now to make a logout button.

Here the code 

<?php
/*
PHP Form Login Remember Functionality with Cookies
*/
if(!empty($_POST["remember"])) {
	setcookie ("username",$_POST["username"],time()+ 3600);
	setcookie ("password",$_POST["password"],time()+ 3600);
    setcookie ("color",$_POST["color"],time()+ 3600);
    //3600 = 1 hour
    //86400 = 1 day
    //(8640*30) = 1 month
	echo "Cookies Set Successfuly";
} else {
	setcookie("username","");
	setcookie("password","");
    setcookie("color","");
	echo "Cookies Not Set";
}
?>
  <form action="Cookies.php" method="post"
 style="border: 2px dotted blue;
 text-align:center; width: 400px;">

 <p>Welcome <?php echo ( !empty($_POST ['username']) ) ?
  $_POST ['username'] : 'USER'; ?>
    </p>
	<p>Username: <input name="username" type="text" 
    value="<?php if(isset($_COOKIE["username"])) 
    { echo $_COOKIE["username"],( !empty($_POST ['username']) ) ?
  $_POST ['username'] : '';} ?>" >
	</p>
	<p>Password: <input name="password" type="password" value="
    <?php if(isset($_COOKIE["password"])) 
    { echo $_COOKIE["password"]; } ?>" >
	</p>
    <p>Choose Your Favorite Color: <input name="color" type="color" 
    value="<?php if(isset($_COOKIE["color"])) 
    { echo $_COOKIE["color"]; } ?>">
	</p>
	<p><input type="checkbox" name="remember" /> Remember me</p>
	<p><input type="submit" value="Login"></p>  
</form>

Any idea ??

[requinix]

Check the documentation for setcookie().

[ginerjm]

You should NOT EVER store any kind of hint to a password.  Once the user has logged in with his/her password all you need is perhaps the username and a token (maybe).  You never need the pswd again.