PHP is a widely used server-side scripting language that powers over 78% of websites. It allows developers to create dynamic web pages through features like control structures, functions, object-oriented programming, and database connectivity using MySQLi or PDO. When working with PHP, it is important to follow best practices such as testing, documenting, and optimizing code for efficiency, security, and readability.

1. The Power of PHP
PHP is a server-side scripting language used for web development, creating
dynamic and interactive web pages. It powers over 78% of all websites on
the internet, including Facebook and Wikipedia.
by Md Haneef

2. Data Types in PHP
1 Strings
Series of characters enclosed in
quotes
2 Integers
Whole numbers without a decimal
point
3 Floats
Numbers with a decimal point
4 Arrays
A collection of values

3. PHP Control Structures
If...Else
Execute certain code if a condition is met
For Loops
Run a block of code a certain number of
times
Switch Statement
Choose between different actions based
on conditions

4. PHP Functions
User-Defined Functions
Custom code you can call later
Built-In Functions
Ready-to-use functions in PHP
Best Practices
Test, document, and optimize your code for efficiency and readability.

5. Object-Oriented Programming in PHP
1
Class Definition
Create a blueprint for future objects
2
Inheritance
Use an existing class to create a new one with modified
functionality
3
Polymorphism
Use objects of different classes in the same way

6. Working with Databases in PHP
Database Connection
Connect PHP to a database using
MySQLi or PDO
Creating Tables
Define the structure of the data you'll store
Retrieving Data
Select and display data from your
database on your website

7. Common Pitfalls in PHP
Security Issues
SQL injection, cross-site scripting,
and other vulnerabilities
Error Handling
Debugging and troubleshooting,
including common syntax errors
Performance Optimization
Caching, minimizing HTTP requests,
and server-side optimization

8. Best Practices in PHP
1
Code Readability
Follow standards for spacing, indentation, and naming
conventions
2
Modularity
Break down your code into smaller, reusable components
3
Documentation
Comment your code and use consistent formatting