PHP Setcookie () usage, Phpsetcookie usage _php tutorial

PHP Setcookie () usage, Phpsetcookie usage

Definition and usage

The Setcookie () function sends an HTTP cookie to the client.

A cookie is a variable that is sent to the browser by the server. A cookie is usually a small text file that the server embeds into a user's computer. This cookie is sent whenever the computer requests a page through a browser.

The name of the cookie is specified as a variable of the same name. For example, if the cookie being sent is named "name", a variable named $user is automatically created, containing the value of the cookie.

There can be no loss before a cookie is assigned a value. If successful, the function returns True, otherwise false is returned.

Note:cookie settings must be refreshed later to take effect.

Grammar

1. Setcookie(name,value,expire,path,domain,secure)

Parameters	Description
Name	Necessary. Specifies the name of the cookie.
Value	Necessary. Specifies the value of the cookie.
Expire	Optional. Specify the validity period of the cookie.
Path	Optional. Specifies the server path of the cookie.
Domain	Optional. Specifies the domain name of the cookie.
Secure	Optional. Specifies whether to transfer cookies through a secure HTTPS connection.

Hints and Notes

Note: You can access the value of a COOKIE named "User" by $HTTP _cookie_vars["user"] or $_cookie["user".

Note: When a cookie is sent, the value of the cookie is automatically URL-encoded. The URL is decoded when it is received. If you don't need this, you can use Setrawcookie () instead.

Example 1

Set up and send cookies:

1. !--? PHP
2. $value = My cookie value "
3. //send a simple cookie
4. setcookie ( "TestCookie" $value
5. ?> ...

1. Php
2. $value = "My cookie Value";
3. Send a cookie that expires in the 24 child
4. Setcookie("TestCookie",$value, time() +3600*);
5. ?> ...

Example 2

Different ways to retrieve cookie values:

1. !--? PHP
2. //output individual cookies
3. echo $_cookie[ "TestCookie" ;
4. echo "
   "
5. echo $HTTP _cookie_vars[ "TestCookie"
6. echo "
   " ;
7. //output all Cookies
8. print_r ($_cookie
9. ?>

Output:

1. My cookie value
2. My cookie value
3. Array ([testcookie] = my cookie value)

Example 3

Delete a cookie by setting the expiration date to the last Date/time:

1. Php
2. Set the expiration date to one hour ago
3. Setcookie ("TestCookie", " ", time() - 3600);
4. ?> ...

Example 4

Create an array cookie:

2. Php
4. Setcookie("Cookie[three]", "cookiethree");
6. Setcookie("cookie[two]", "cookietwo");
8. Setcookie("Cookie[one]", "cookieone");
10. Output cookie (after reloading the page)
12. If (isset($_cookie["COOKIE"])) {
14. foreach ($_cookie["COOKIE"] as $name + = $value) {
16. Echo "$name: $value
    ";
18. }
20. }
22. ?> ...

Output:

1. Three : cookiethree
2. Both : cookietwo
3. One : cookieone

Example 5

An issue that does not take effect when a cookie is set. Usually the reason why the scope is not set

1. Php
2. Setcookie("A","BB", Time() +3600,"/",". hi-docs.com");
3. Note that the domain name is set to its own
4. ?>

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