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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php删除/清除cookie的两种方法
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
<?phpsetcookie ( "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
<?phpsetcookie ( "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.";?>
以上就是php如何删除cookies的详细内容。