The setcookie() function sends an HTTP cookie to the client.
Cookie is a variable sent by the server to the browser. Cookies are typically small text files that a server embeds on a user's computer. This cookie is sent each time the computer requests a page through the 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 cookie's value.
There cannot be any input before assigning a value to the cookie. The function returns true if successful, false otherwise.
Note: The cookie setting must be refreshed before it can take effect.
Syntax
setcookie(name,value,expire,path,domain,secure)
Parameter Description
name Required. Specifies the name of the cookie.
value Required. Specifies the cookie value.
expire Optional. Specifies the validity period of the cookie.
path Optional. Specifies the server path for cookies.
domain Optional. Specifies the domain name for the cookie.
secure Optional. Specifies whether cookies are transmitted over a secure HTTPS connection.
Tips and Notes
Note: The cookie named "user" can be accessed through $HTTP_COOKIE_VARS["user"] or $_COOKIE["user"] value.
Note: When sending a cookie, the cookie value is automatically URL encoded. URL decoding occurs on reception. If you don't need this, you can use setrawcookie() instead.
Example 1
Set and send a cookie:
<?php
$value = "my cookie value";
// 发送一个简单的 cookie
setcookie("TestCookie",$value);
?><html><body>......<?php
$value = "my cookie value";
// 发送一个 24 小时候过期的 cookie
setcookie("TestCookie",$value, time()+3600*24);
?><html><body>......Example 2
Different ways to retrieve cookie values:
<html><body><?php
// 输出个别的 cookie
echo $_COOKIE["TestCookie"];
echo "<br />";
echo $HTTP_COOKIE_VARS["TestCookie"];
echo "<br />";
// 输出所有 cookie
print_r($_COOKIE);
?></body></html>Output:
my cookie value my cookie value Array ([TestCookie] => my cookie value)
Example 3
Delete a cookie by setting the expiration date to a date/time in the past:
<?php
// 把失效日期设置为一小时前
setcookie ("TestCookie", "", time() - 3600);
?><html><body>......Example 4
Create An array cookie:
<?php
setcookie("cookie[three]","cookiethree");
setcookie("cookie[two]","cookietwo");
setcookie("cookie[one]","cookieone");
// 输出 cookie （在重载页面后）
if (isset($_COOKIE["cookie"])){
foreach ($_COOKIE["cookie"] as $name => $value){
echo "$name : $value <br />";
}
}
?><html><body>......Output:
three : cookiethree
two : cookietwo
one : cookieoneExample 5
About the problem that the cookie does not take effect after being set. Usually the reason is that the scope is not set
<?php
setcookie("a","bb",time()+3600,"/",".hi-docs.com");
// 注意把域名设置为自己的
?>Recommendation:PHP video tutorial
The above is the detailed content of Example of PHP method to set setcookie. For more information, please follow other related articles on the PHP Chinese website!
PHP's Current Status: A Look at Web Development TrendsApr 13, 2025 am 12:20 AMPHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.
PHP vs. Other Languages: A ComparisonApr 13, 2025 am 12:19 AMPHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.
PHP vs. Python: Core Features and FunctionalityApr 13, 2025 am 12:16 AMPHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.
PHP: A Key Language for Web DevelopmentApr 13, 2025 am 12:08 AMPHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
PHP: The Foundation of Many WebsitesApr 13, 2025 am 12:07 AMThe reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.
Beyond the Hype: Assessing PHP's Role TodayApr 12, 2025 am 12:17 AMPHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.
What are Weak References in PHP and when are they useful?Apr 12, 2025 am 12:13 AMIn PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.
Explain the __invoke magic method in PHP.Apr 12, 2025 am 12:07 AMThe \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 Chinese version
Chinese version, very easy to use
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
Dreamweaver Mac version
Visual web development tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
