How to delete cookies in php

How to delete cookies in php: 1. Use the "setcookie('cookiename', '')" method to set the cookie value to empty; 2. Use the "setcookie('cookiename', '', time( )-3600);" method.

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Two ways to delete/clear cookies in php

Set the cookie value to empty, that is: setcookie('cookiename', '') or setcookie(cookiename, NULL);

Set the cookie expiration time to the past, that is: setcookie ('cookiename','',time()-3600);

Method 1: Set the cookie value to empty

<?php
setcookie ( "cookie_user", "test", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", md5 ( "test" ), time () + 60 * 60 * 24 * 30 );
function logout() {
  setcookie ( "cookie_user", "", time () + 60 * 60 * 24 * 30 );
  setcookie ( "cookie_pass", "", time () + 60 * 60 * 24 * 30 );
}
/* http://www.manongjc.com/article/1253.html */
logout ();
echo $_COOKIE [&#39;cookie_user&#39;] . "<br />";
echo "You have successfully logged out.";
?>

Second method: Set the cookie expiration time to the past

<?php
setcookie ( "cookie_user", "test", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", md5 ( "test" ), time () + 60 * 60 * 24 * 30 );
function logout() {
  setcookie ( "cookie_user", "test", time () - 100 );
  setcookie ( "cookie_pass", md5 ( "test" ), time () - 100 );
}
logout ();
echo $_COOKIE [&#39;cookie_user&#39;] . "<br />";
echo "You have successfully logged out.";
?>

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