1. Install Nginx using yum (2) , Install the G++ compiler yum -y install gcc-c++
(3), Install the PCRE library yum -y install pcre pcre-devel
Install the zlib library yum -y install zlib zlib-devel
Install the OpenSSL development library yum -y install openssl openssl-devel
3. Nginx directory structure
Use the root user to install online. Nginx is saved in the following directories.
/usr/sbin/nginx -------------------------- nginx under sbin is an executable file, which can be used to start nginx
/etc/nginx -------------------------- This is the nginx program installation directory
/usr/share/nginx -------------------------- The shared files are placed here, which contain the test homepage
/usr/share/man/ man8/nginx.8.gz
/usr/share/man/man3/nginx.3pm.gz
4. Linux kernel parameter optimization First of all, you need to modify
/etc/sysctl. conffile to modify kernel parameters (the first time you open it is an empty file). For example, the most commonly used configuration:
fs.file-max = 10000 net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_keepalive_time = 600 net.ipv4.tcp_fin_timeout = 30
net.ipv4.ip_local_port_range = 1024 61000 net.ipv4.tcp_rmem = 4096 32768 262142 net.ipv4.tcp_wmem = 4096 32768 262142
net.core.netdev_max_ backlog = 8096net.core.rmem_default = 262144 net.core. wmem_default = 262144 net.core.rmem_max = 2097152 net.core.wmem_max = 2097152 net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 1024
Then execute
sysctl -p
to make the above The settings take effect.
Related instructions:
The above introduces the installation and configuration of Nginx server under Linux, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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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