


PHP website development plan (a must-read for new developers)_PHP tutorial
1. Development members
a) Project Manager
b) Page art
c) Page development
d)Server-side program development
e) System and data management
f)Testing and version control
2. Simple process for website team development
3. Development tools and environment
a) Server configuration
i. WEB server: FreeBSD6.1+Apache2.0+PHP5.0, SVN version control service (test machine only).
ii. Database server: WIN2003 server+SQL server 2000+MySQL5.0, CLUSTERED SERVER cluster service, mail server.
iii. 100M/1000M switch
b) Development tools
i. Front desk: Macromedia flash 8.0, Macromedia Dreamweaver 8.0, Adobe photoshop CS
ii. Backend: Zend Studio 5.2, SQL Server Enterprise Manager, PhpMyAdmin
4. Technical Rules
a) Browser compatibility strategy: Compatible with IE5.0 or above, and compatible with FireFOX2.0 or above browsers.
b) Search engine optimization: Focus on baidu, Google, and Yahoo search optimization and create a clear website map.
c) Character encoding rules: Chinese websites always adopt the GB2312 character standard.
d) File and folder naming: To be compatible with win32 and unix systems, lowercase letters are always used for naming.
e) Public file naming rules:
i. Default homepage: index.htm, index.html, index.php
ii. Main CSS file: style.css
iii. Main JS file: main.js
iv. Main program configuration file: config.php
f) Unified naming of public file directories
i. Picture directory: /images or /pic
ii. CSS style directory: /css
iii. JS script program directory:/js
iv. Template file directory: /tpl
v. Class or component directory: /class or /lib
g) Page script specifications: Uniformly use JavaScript
h) Class, function, and variable names in the code: use similar English word names, such as: DefaultClass or default_class
i) Code comment rules: All functions or procedures in the program must be accurately commented.
j) Database related rules
i. Data table and field naming rules: Name with all lowercase letters, and classify the naming prefix, such as: user table group, user_passport, user_info, user_service….
ii. Date type field: Unix timestamp is used uniformly, char(12)
iii. Primary key naming: All tables must have a primary key named after id.
k) Template component rules: Use compatible versions of Smarty and unified cache directories to facilitate permission control under Unix.
l) Database virtual layer: Use Adodb or Pdo uniformly, and SQL statements must be compatible with existing mainstream database rules.
m) Factory mode development rules: Develop or inherit component classes with comm.php as the center, and uniformly control file calling IO and class instantiation.
n) Object-oriented development rules: All functions must exist in the form of class ---> procedures.
o) SQL encapsulation rules: All SQL statements and database queries must exist in the process.
p) URL redirection rules: In order to optimize search engines, try to use Apache's mod_rewrite module to beautify the URL, such as: http://www.BkJia.com/action.php?id=123 converted to: http://www.BkJia .com/action/id/123 or http://www.BkJia.com/action/id_123.html
5. Website security and maintenance strategy
a) Server and database security:
i. Establish a complete virus defense mechanism, install a firewall, and close any unnecessary ports and services on the server.
ii. Manage user permissions in a unified manner, regularly track user and system events, and check system logs regularly.
b) Disaster recovery and backup mechanism:
i. Establish a database cluster and keep at least one server synchronized with data to ensure that the database system can automatically transfer to a normal server for stable operation when an accident occurs.
ii. Back up files and data regularly and save data and files through various methods.
c) Program security policy:
i. SQL injection prevention: Resolutely filter out unforeseen illegal characters, and strictly check SQL statements for database queries and updates.
ii. Do not use third-party source code from unknown sources, and do not easily copy unknown code to the server.

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.


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