PHP cookie removal with FF under cookie cannot delete _php tutorial

Set and delete cookies in PHP we use Setcookie to set them up and automatically delete them when they expire, but under FF you may encounter cookies that cannot expire.

First, let's take a look at the instructions in the PHP manual for deleting cookies.

BOOL Setcookie (string name [, string value [, int expire [, String path [, string domain [, bool secure]]])

To delete a cookie, you need to ensure that its expiration period is in the past before it triggers the browser's removal mechanism.
The following example shows how to delete a cookie that you just set: Example 2. Setcookie () Delete
Example

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Set the expiration time to one hour ago Setcookie ("TestCookie", "", Time ()-3600); Setcookie ("TestCookie", "", Time ()-3600, "/~rasmus/", ". utoronto.ca", 1);

Store the user's login information, and then use the

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Setcookie ("username", "", Time ()-3600);

Do quit and test under IE without any problems. Since do the website, must be compatible with as many browsers, hehe. So in Firefox test, landing all normal, when launched, encountered trouble. How not to quit, the user is always logged in state. So I looked at the difference between the cookie records in IE and Firefox, and after testing, it dawned on me.

If you do not specify the fourth parameter of Setcookie () (The legal Path parameter), the current directory will be the default path, and the path I tested is: http://127.0.0.1/php/rss2fla/data/log.php, which results in login and exit The cookie path set is different.

IE more humane than Firefox, hehe, when the United States to specify the path, will overwrite the current IP under the same name cookie variable, and Firefox is more stringent, resulting in a re-built a variable ...

Take a look at some examples:

Simple:

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Setcookie ("MyCookie", "Value of MyCookie");

With time of failure:

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Setcookie ("Withexpire", "Expire in 1 Hour", Time () +3600);//3600 seconds = 1 hours

There are everything:

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Setcookie ("Fullcookie", "full cookie value", Time () +3600, "/forum", ". bkjia.c0m", 1);

The last one is compatible with all browsers.

In summary, it is best to use the following method when working with cookies in PHP:

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if (Isset ($_cookie["Sid"]) &&!empty ($_cookie["Sid"]) { This ensures that the cookie is present and within the validity period ...... }

http://www.bkjia.com/PHPjc/632780.html www.bkjia.com true http://www.bkjia.com/PHPjc/632780.html techarticle set and delete cookies in PHP we use Setcookie to set them up and automatically delete them when they expire, but under FF you may encounter cookies that cannot expire. First we look at the PHP manual ...

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