Backend DevelopmentPHP TutorialHow to obtain form data through get method in PHP? (detailed explanation)
When we design web pages for interaction, we usually use the get variable method in PHP to obtain the data in the form, so as to implement various web page dynamic queries or requests. For friends who have a little basic knowledge of HTML, they should all know that there are two submission methods in HTML forms, namely get and post. However, for novices, this knowledge point may be a bit vague.
Then this article mainly introduces the get method in detail, that is, the specific method and use of PHP to obtain form form data through get variables. Later articles will continue to introduce the specific usage and function of post.
The following is a specific code example for you:
1. Form form code example (form get submission)
<head>
<meta charset="utf-8">
<title>form表单get方法示例</title>
</head>
<body>
<form action="/test/test.php" method="get" >
<form action="test.php" method="get">
名字: <input type="text" name="fname"><br>
年龄: <input type="text" name="age"><br>
<input type="submit" value="提交">
</form>
</form>
</body>
</html>Effect As shown below:
2, test.php code (php receives get data)
<?php
header("content-type:text/html;charset=utf-8"); //设置编码
?>
欢迎 <?php echo $_GET["fname"]; ?>!<br>
你的年龄是 <?php echo $_GET["age"]; ?> 岁。After clicking the submit button in code 1 , the effect of the web page is as follows:
Here you can pay attention to observe, what are the characteristics of the links in the browser address bar? It is not difficult to find that the information sent from the form with the GET method will be displayed in the address bar and is visible to anyone. That is, when using method="get" in an HTML form, all variable names and values will be displayed in the URL. (Note: The test.php file can collect form data through the $_GET variable)
To sum up: this method should not be used when sending passwords or other sensitive information! But because the variable parameters appear in the URL, you can bookmark the page. In some cases, it is also useful, such as when some information needs to be displayed directly to the user.
The above introduction to relevant knowledge about PHP obtaining form get parameters hopes to be helpful to friends in need.
The above is the detailed content of How to obtain form data through get method in PHP? (detailed explanation). For more information, please follow other related articles on the PHP Chinese website!
How does PHP identify a user's session?May 01, 2025 am 12:23 AMPHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.
What are some best practices for securing PHP sessions?May 01, 2025 am 12:22 AMThe security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.
Where are PHP session files stored by default?May 01, 2025 am 12:15 AMPHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita
How do you retrieve data from a PHP session?May 01, 2025 am 12:11 AMToretrievedatafromaPHPsession,startthesessionwithsession_start()andaccessvariablesinthe$_SESSIONarray.Forexample:1)Startthesession:session_start().2)Retrievedata:$username=$_SESSION['username'];echo"Welcome,".$username;.Sessionsareserver-si
How can you use sessions to implement a shopping cart?May 01, 2025 am 12:10 AMThe steps to build an efficient shopping cart system using sessions include: 1) Understand the definition and function of the session. The session is a server-side storage mechanism used to maintain user status across requests; 2) Implement basic session management, such as adding products to the shopping cart; 3) Expand to advanced usage, supporting product quantity management and deletion; 4) Optimize performance and security, by persisting session data and using secure session identifiers.
How do you create and use an interface in PHP?Apr 30, 2025 pm 03:40 PMThe article explains how to create, implement, and use interfaces in PHP, focusing on their benefits for code organization and maintainability.
What is the difference between crypt() and password_hash()?Apr 30, 2025 pm 03:39 PMThe article discusses the differences between crypt() and password_hash() in PHP for password hashing, focusing on their implementation, security, and suitability for modern web applications.
How can you prevent Cross-Site Scripting (XSS) in PHP?Apr 30, 2025 pm 03:38 PMArticle discusses preventing Cross-Site Scripting (XSS) in PHP through input validation, output encoding, and using tools like OWASP ESAPI and HTML Purifier.
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
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
Atom editor mac version download
The most popular open source editor
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 English version
Recommended: Win version, supports code prompts!
