php如何刪除cookies

php刪除cookies的方法：1、使用「setcookie('cookiename', '')」方法將cookie的值設為空白；2​​、透過「setcookie('cookiename','',time( )-3600);”方法。

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php刪除/清除cookie的兩種方法

將cookie的值設為空,即：setcookie('cookiename', '')或setcookie(cookiename, NULL);

將cookie的過期時間設為過去，即：setcookie ('cookiename','',time()-3600); 

 

方法一：將cookie的值設為空白

<?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.";
?>

 

第二種方法：將cookie的過期時間設定為過去

<?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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