php如何删除cookies

php删除cookies的方法：1、使用“setcookie('cookiename', '')”方法将cookie的值设置为空；2、通过“setcookie('cookiename','',time()-3600);”方法。

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

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