Backend DevelopmentPHP TutorialExplain the predefined super global array variables of PHP arrays
php Arrays play an important role in php. This article will explain its related contents in detail.
1)GLOBALS
2) _SERVER
Server variables, different web servers may have different contents
3) G ET gets HTTPGET Parameters passed by the HTTP POST method, such as parameters passed by the url or form GET method
4) _POST
Get parameters passed by the HTTP POST method, such as parameters passed by the form POST method
5) F ILESHTTP file upload variable
6) _COOKIE
7) S ESSION
8) _REQUEST
includes G ET, _POST and C OOKIE All content in .
9) _ENV
Environment variables are related to the environment in which PHP is running.
If there is no data, it may be related to the phpini configuration item variables_order configuration item
already A defined (existing) variable (the type of data stored is an array).
Super global: super global variable, scope (valid area)!
There are two main ways to pass data (submit data) to the server
1.get method
For example:
Parameter name=parameter value¶meter Name = parameter value...
On the server side (the requested php file), you can obtain the _GET index value as the parameter name through GET, and the data corresponding to the index value is the parameter value
2.Post method
For example, it is sent via form post!
Can be obtained through $_POST!
<?php
var_dump($_GET);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>预定义超全局数据变量</title>
</head>
<body>
<form method="get">
姓名:<input type="text" name='username' /><br />
性别:<input type="text" name='sex' /><br />
<input type="text" name='dwqdwqdqw' />
<input type="submit" value='提交' />
</form>
</body>
</html>This article explains the predefined super-global array variables of PHP arrays. For more related content, please pay attention to the PHP Chinese website.
Related recommendations:
Explain how to use pdo placeholder in php
##List PHP null value detection functions and methods
PHP connects to the database and implements the most basic add, delete, modify and query operations through process-oriented methods
The above is the detailed content of Explain the predefined super global array variables of PHP arrays. 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
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
Zend Studio 13.0.1
Powerful PHP integrated development environment
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.
Dreamweaver CS6
Visual web development tools
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
