将cookie的值设置为空,即：setcookie('cookiename','')或者setcookie(cookiename,NULL);
将cookie的过期时间设置为过去，即：setcookie('cookiename','',time()-3600);
方法一：将cookie的值设置为空
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 );
}
/* http://www.manongjc.com/article/1253.html */
logout ();
echo $_COOKIE ['cookie_user'] . "
";
echo "You have successfully logged out.";
?>
第二种方法：将cookie的过期时间设置为过去
PHP
setcookie ( "cookie_user",time () - 100 );
setcookie ( "cookie_pass",time () - 100 );
}
logout ();
echo $_COOKIE ['cookie_user'] . "
";
echo "You have successfully logged out.";
?>
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