blocks|key|1322764|text|PHP+setcookie()|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1322765|从该页面获取，这将取消设置您的域的所有cookies：|1322766|//+unset+cookies
if+(isset($_SERVER['HTTP_COOKIE']))+{
++++$cookies+=+explode(';',+$_SERVER['HTTP_COOKIE']);
++++foreach($cookies+as+$cookie)+{
++++++++$parts+=+explode('=',+$cookie);
++++++++$name+=+trim($parts[0]);
++++++++setcookie($name,+'',+time()-1000);
++++++++setcookie($name,+'',+time()-1000,+'/');
++++}
}|code-block|syntax|javascript|1322767|http://www.php.net/manual/en/function.setcookie.php#73484|1322768|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/function.setcookie.php|1^0|0|F|0|0|0|0|0|1L|1|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|10|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|M|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|L]]]]

<a href="http://php.net/manual/en/function.setcookie.php" rel="noreferrer">PHP setcookie()</a>

Taken from that page, this will unset all of the cookies for your domain:

<pre><code>// unset cookies
if (isset($_SERVER['HTTP_COOKIE'])) {
 $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
 foreach($cookies as $cookie) {
 $parts = explode('=', $cookie);
 $name = trim($parts[0]);
 setcookie($name, '', time()-1000);
 setcookie($name, '', time()-1000, '/');
 }
}
</code></pre>

<a href="http://www.php.net/manual/en/function.setcookie.php#73484" rel="noreferrer">http://www.php.net/manual/en/function.setcookie.php#73484</a>

blocks|key|1107736|text|$past+=+time()+-+3600;
foreach+(+$_COOKIE+as+$key+=>+$value+)
{
++++setcookie(+$key,+$value,+$past,+'/'+);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1107737|然而，更好的做法是记住(或将其存储在某个地方)哪些cookie是在域上的应用程序中设置的，并直接删除所有这些cookie。|unstyled|1107738|这样，您就可以确保正确删除所有值。|1107739|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>$past = time() - 3600;
foreach ( $_COOKIE as $key =&gt; $value )
{
 setcookie( $key, $value, $past, '/' );
}
</code></pre>

Even better is however to remember (or store it somewhere) which cookies are set with your application on a domain and delete all those directly. 
That way you can be sure to delete all values correctly.

blocks|key|1107837|text|我同意上面的一些答案。我只建议将"time()-1000“替换为"1”。值"1“表示1970年1月1日，可确保100%25过期。因此：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1107838|setcookie($name,+'',+1);
setcookie($name,+'',+1,+'/');|code-block|syntax|javascript|1107839|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I agree with some of the above answers. I would just recommend replacing "time()-1000" with "1". A value of "1" means January 1st, 1970, which ensures expiration 100%. Therefore:

<pre><code>setcookie($name, '', 1);
setcookie($name, '', 1, '/');
</code></pre>

blocks|key|1322672|text|确保在站点上发生任何输出之前调用setcookie函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322673|此外，如果您的用户正在注销，您还应该删除/使他们的会话变量无效。|1322674|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

make sure you call your setcookie function before any output happens on your site.

also, if your users are logging out, you should also delete/invalidate their session variables.

blocks|key|1107891|text|当您更改Cookie的名称时，您可能还希望删除所有Cookie，但保留一个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1107892|if+(isset($_COOKIE))+{
++++foreach($_COOKIE+as+$name+=>+$value)+{
++++++++if+($name+!=+"preservecookie")+//+Name+of+the+cookie+you+want+to+preserve+
++++++++{
++++++++++++setcookie($name,+'',+1);+//+Better+use+1+to+avoid+time+problems,+like+timezones
++++++++++++setcookie($name,+'',+1,+'/');
++++++++}
++++}
}|code-block|syntax|javascript|1107893|同样基于此PHP-Answer|offset|length|1107894|entityMap|0|LINK|mutability|MUTABLE|url|https://php.net/manual/en/function.setcookie.php#73484^0|0|0|5|A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

When you change the name of your Cookies, you may also want to delete all Cookies but preserve one:

<pre><code>if (isset($_COOKIE)) {
 foreach($_COOKIE as $name =&gt; $value) {
 if ($name != "preservecookie") // Name of the cookie you want to preserve 
 {
 setcookie($name, '', 1); // Better use 1 to avoid time problems, like timezones
 setcookie($name, '', 1, '/');
 }
 }
}
</code></pre>

Also based on this <a href="https://php.net/manual/en/function.setcookie.php#73484" rel="nofollow">PHP-Answer</a>

blocks|key|1107791|text|你应该知道像Google+Analytics这样的各种跟踪工具也在你的域上使用cookie，如果你想在GA中有正确的数据，你不想删除它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1107792|我能运行的唯一解决方案是将现有的cookie设置为null。我无法从客户端删除cookie。|1107793|因此，为了让用户注销，我使用以下命令：|1107794|setcookie("username",+null,+time()%2B$this->seconds,+"/",+$this->domain,+0);
setcookie("password",+null,+time()%2B$this->seconds,+"/",+$this->domain,+0);|code-block|syntax|javascript|1107795|当然，这并不会删除所有的cookie。|1107796|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You should be aware of various tracking tools like Google Analytics also use cookies on your domain and you don't want to delete them, if you want to have correct data in GA.

The only solution I could get working was to set the existing cookies to null. I couldn't delete the cookies from the client.

So for logging a user out I use the following:

<pre><code>setcookie("username", null, time()+$this-&gt;seconds, "/", $this-&gt;domain, 0);
setcookie("password", null, time()+$this-&gt;seconds, "/", $this-&gt;domain, 0);
</code></pre>

Of course this doesn't delete ALL cookies.

blocks|key|1323061|text|所有以前的答案都忽略了setcookie可以与显式域一起使用。此外，cookie可能设置在更高的子域上，例如，如果您在foo.bar.tar.com域上，则可能在tar.com上设置了cookie。因此，您希望为可能丢弃cookie的所有域取消设置cookie：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1323062|$host+=+explode('.',+$_SERVER['HTTP_HOST']);

while+($host)+{
++++$domain+=+'.'+.+implode('.',+$host);

++++foreach+($_COOKIE+as+$name+=>+$value)+{
++++++++setcookie($name,+'',+1,+'/',+$domain);
++++}

++++array_shift($host);
}|code-block|syntax|javascript|1323063|entityMap^0|B|9|1N|F|29|7|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

All previous answers have overlooked that the <code>setcookie</code> could have been used with an explicit domain. Furthermore, the cookie might have been set on a higher subdomain, e.g. if you were on a <code>foo.bar.tar.com</code> domain, there might be a cookie set on <code>tar.com</code>. Therefore, you want to unset cookies for all domains that might have dropped the cookie:

<pre><code>$host = explode('.', $_SERVER['HTTP_HOST']);

while ($host) {
 $domain = '.' . implode('.', $host);

 foreach ($_COOKIE as $name =&gt; $value) {
 setcookie($name, '', 1, '/', $domain);
 }

 array_shift($host);
}
</code></pre>

blocks|key|1323108|text|使用函数清除cookies：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1323109|function+clearCookies($clearSession+=+false)
{
++++$past+=+time()+-+3600;
++++if+($clearSession+===+false)
++++++++$sessionId+=+session_id();
++++foreach+($_COOKIE+as+$key+=>+$value)
++++{
++++++++if+($clearSession+!==+false+%7C%7C+$value+!==+$sessionId)
++++++++++++setcookie($key,+$value,+$past,+'/');
++++}
}|code-block|syntax|javascript|1323110|如果您传递true，那么它将清除session数据，否则将保留会话数据。|offset|length|style|CODE|1323111|entityMap^0|0|0|5|4|G|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

Use the function to clear cookies:

<pre><code>function clearCookies($clearSession = false)
{
 $past = time() - 3600;
 if ($clearSession === false)
 $sessionId = session_id();
 foreach ($_COOKIE as $key =&gt; $value)
 {
 if ($clearSession !== false || $value !== $sessionId)
 setcookie($key, $value, $past, '/');
 }
}
</code></pre>

If you pass <code>true</code> then it clears <code>session</code> data, otherwise session data is preserved.

blocks|key|1323224|text|我知道这个问题很老，但这是一个更简单的选择：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1323225|header_remove();|code-block|syntax|javascript|1323226|但是要小心！它将擦除所有标头，包括Cookie、Session等，如the+docs中所述。|offset|length|1323227|entityMap|0|LINK|mutability|MUTABLE|url|https://secure.php.net/manual/en/function.header-remove.php^0|0|0|Y|8|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

I know this question is old, but this is a much easier alternative:

<pre><code>header_remove();
</code></pre>

But be careful! It will erase ALL headers, including Cookies, Session, etc., as explained in <a href="https://secure.php.net/manual/en/function.header-remove.php" rel="nofollow noreferrer">the docs</a>.

blocks|key|1108152|text|<?php
++++++parse_str(http_build_query($_COOKIE),$arr);
++++++foreach+($arr+as+$k=>$v)+{
++++++++setCookie("$k","",1000,"/");
++++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1108153|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>&lt;?php
 parse_str(http_build_query($_COOKIE),$arr);
 foreach ($arr as $k=&gt;$v) {
 setCookie("$k","",1000,"/");
 }
</code></pre>

blocks|key|1108235|text|我不得不将以下内容添加到顶部答案中，以实际删除一些不会消失的cookie：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1108236|foreach($_COOKIE+as+$cook)+{
++++setcookie($cook,+'',+time()-1000);
++++setcookie($cook,+'',+time()-1000,+'/');
}|code-block|syntax|javascript|1108237|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I had to add the following to the top answer to actually remove a few cookies that wouldn't go away:
<pre><code>foreach($_COOKIE as $cook) {
 setcookie($cook, '', time()-1000);
 setcookie($cook, '', time()-1000, '/');
}
</code></pre>

I'm wondering if I can delete all my website's cookies when a user click on logout, because I used this as function to delete cookies but it isn't work properly:

<pre><code>setcookie("user",false);
</code></pre>

Is there a way to delete one domain's cookies in PHP?

how to delete all cookies of my website in php

我想知道当用户单击注销时，我是否可以删除我网站的所有cookie，因为我使用此函数删除cookie，但它不能正常工作：setcookie("user",false);有没有办法在PHP中删除一个域的cookie？

问如何在php中删除我网站的所有cookie？
EN

回答 11

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问如何在php中删除我网站的所有cookie？EN

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问如何在php中删除我网站的所有cookie？
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