| Parameters | Description | Example |
| Name | Cookie name | Use$ _ Cookie ['cookiename']Call the cookie named cookiename. |
| Value | Cookie value, which is stored on the client. Do not store sensitive data. | Assume thatNameIs 'cookiename', you can use$ _ Cookie ['cookiename']Obtain the value. |
| Expire | The time when the cookie expires. This is a UNIX timestamp, that is, the number of seconds from the Unix epoch. In other words, it is usually usedTime ()The function plus the number of seconds to set the cookie expiration time. Or useMktime (). |
Time () + 60*60*24*30The cookie is set to expire after 30 days. If not set, the cookie will expire after the session ends (usually closed by the browser. |
| path | valid Cookie Path on the server. | if this parameter is set to '/' , the cookie is valid for the entire domain . if it is set to '/Foo/' , the cookie is valid only in the /Foo/ directory and Its subdirectories under domain , for example, /Foo/BAR/. the default value is the current directory of the cookie. |
| domain | valid Domain Name of the cookie. | to make the cookie valid for all subdomains under the domain name example.com, set this parameter to '.example.com' . although . is not mandatory, but it is compatible with more browsers. if this parameter is set to www.example.com , it is valid only in the WWW subdomain. For details, see tail matching in cookie standards. |
| Secure | Indicates whether the cookie is transmitted only through a secure HTTPS connection. When setTrueThe cookie is only set in secure connections. The default value isFalse. |
0Or1 |
Example 1. setcookie () Sending example
CopyCodeThe Code is as follows: $ value = 'something from somewhere ';
Setcookie ("testcookie", $ value );
Setcookie ("testcookie", $ value, time () + 3600);/* expire in 1 hour */
Setcookie ("testcookie", $ value, time () + 3600 ,"/~ Rasmus/",". utoronto. ca ", 1 );
Note that the portion of the value in the cookie will be automatically encoded with urlencode upon sending and automatically decoded upon receipt, and the value will be assigned to the cookie variable with the same name. If you do not want to do this and use PHP 5, you can use setrawcookie () instead. In the following simple example, we can get the cookie value just set:Copy codeThe Code is as follows: <? PHP
// Output a separate cookie
Echo $ _ cookie ["testcookie"];
Echo $ http_cookie_vars ["testcookie"];
// Another debugging method is to output all cookies.
Print_r ($ _ cookie );
?>
To delete a cookie, you must ensure that its expiration time is in the past to trigger the deletion mechanism of the browser. The following example shows how to delete the cookie you just set:
Example 2. setcookie () Deletion example
Copy codeThe Code is as follows: // set the expiration time to one hour ago
Setcookie ("testcookie", "", time ()-3600 );
Setcookie ("testcookie", "", time ()-3600 ,"/~ Rasmus/",". utoronto. ca ", 1 );
You can also set an array cookie by using array symbols in the cookie name. You can set multiple cookies as array units. When the script extracts cookies, all values are placed in an array:
Example 3. Example of using arrays in setcookie ()
Copy codeThe Code is as follows: <? PHP
// Set cookie
Setcookie ("Cookie [three]", "cookiethree ");
Setcookie ("Cookie [two]", "cookietwo ");
Setcookie ("Cookie [one]", "cookieone ");
// Refresh the page and display it
If (isset ($ _ cookie ['cookies']) {
Foreach ($ _ cookie ['cooker'] as $ name => $ value ){
Echo "$ name: $ value <br/> \ n ";
}
}
?>
The above example will output:
Three: cookiethree
Two: cookietwo
One: cookieone
Summary: it is not difficult to use cookies.ArticleThe record focuses on path setting and domain name setting.
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