Ubuntu下安装PHP
安装apache2:sudo apt-get install apache2。查看是否成功:http://localhost/
安装PHP5:sudo apt-get install php5
sudo apt-get install libapache2-mod-php5(根据俺的实际测试,这一步似乎不用做了,在上一步已经安装好了,不过还是建议你copy/paste一下这条命令)
sudo /etc/init.d/apache2 restart 测试PHP5是否安装成功
sudo gedit /var/www/testphp.php
在里面写入,然后在Firefox中打开: http://localhost/testphp.php
安装mysql:sudo apt-get install mysql-server
MySql初始只允许本机(127.0.0.1)连接,如果想多台机子使用或者向Internet开放的话,编辑/etc/mysql/my.cnf
sudo gedit /etc/mysql/my.cnf
找到bind-address = 127.0.0.1,用#注释掉,象这样:#bind-address = 127.0.0.1
MySql默认没有设置root密码,本机的root用户也没有密码,有风险是吧,这样
mysqladmin -u root password your-new-password
mysqladmin -h root@local-machine-name -u root -p password your-new-password(这里我怎么也连接不上mysql服务器,最后在mysql-admin里面改的)
sudo /etc/init.d/mysql restart
安装MYSQL Administrator:sudo apt-get install mysql-admin
安装MYSQL for Apache HTTP Server
sudo apt-get install libapache2-mod-auth-mysql
sudo apt-get install php5-mysql
(sudo apt-get install phpmyadmin)
要让PHP与MySql一起工作,编辑
sudo gedit /etc/php5/apache2/php.ini
取消对;extension=mysql.so的注释,象这样
…
extension=mysql.so
…
保存文件,然后
sudo /etc/init.d/apache2 restart
测试:
http://localhost/phpmyadmin

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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