PHP Knowledge Base

Introduction to PHP

PHP is a widely-used scripting language for web development. It is especially suited for dynamic websites and web applications. This section provides a basic overview of PHP concepts. It's a server-side scripting language, meaning it's executed on the web server rather than the user's browser.

PHP is known for its ease of learning and use, and it boasts a large and active community.

Key features include:

• Dynamic Content: PHP allows you to generate content dynamically based on user input, database queries, and other factors.
• Database Integration: PHP seamlessly integrates with databases like MySQL, PostgreSQL, and more.
• Server-Side Scripting: As mentioned above, PHP is executed on the server.

For further reading, check out the PHP.net documentation.

PHP Variables and Data Types

Variables are used to store data in PHP. They are declared using the dollar sign ($) followed by the variable name. PHP supports various data types:

• Integers: Whole numbers (e.g., 10, -5, 0).
• Strings: Text enclosed in single or double quotes (e.g., "Hello, world!", 'PHP').
• Booleans: True or false values.
• Arrays: Collections of data (more on this in a later section).
• Objects: Instances of classes (another key concept).

                
                    $name = "John Doe";
                    $age = 30;
                    $is_active = true;
                    $numbers = array(1, 2, 3, 4, 5);