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PHP Classes & Objects

5 min read

What is PHP Classes & Objects?

In this lesson, we explore PHP Classes & Objects. This is an important concept in PHP development that you will use frequently when building real-world projects. Understanding PHP Classes & Objects will help you write cleaner, more efficient code.

Syntax & Usage

The syntax and usage patterns for PHP Classes & Objects follow standard PHP conventions. Below you will see code examples that demonstrate the most common use cases. Try modifying these examples in your own editor to experiment with different approaches.

Example

Here is a practical example demonstrating PHP Classes & Objects:

Tips & Best Practices

  • Always sanitize user input to prevent SQL injection and XSS
  • Use prepared statements for database queries
  • Follow PSR coding standards for consistent code
  • Use Composer for dependency management

Summary

In this lesson you learned about PHP Classes & Objects. Practice writing code to reinforce these concepts and move on to the next lesson when you feel comfortable.

Examples

Example
php 
<?php
class User {
    private string $name;
    private string $email;

    public function __construct(string $name, string $email) {
        $this->name = $name;
        $this->email = $email;
    }

    public function getName(): string {
        return $this->name;
    }

    public function greet(): string {
        return "Hello, I'm {$this->name}!";
    }
}

$user = new User('Alice', 'alice@example.com');
echo $user->greet(); // Hello, I'm Alice!
?>
Practice Yourself »

Test Your Knowledge

Take a quick quiz to check what you've learned in this lesson.

PHP Classes & Objects Quiz

1

How do you start a PHP block?

Explanation: PHP code starts with the <?php opening tag.
2

Which symbol prefixes PHP variables?

Explanation: All PHP variables start with the $ sign followed by the variable name.
3

Which function outputs text in PHP?

Explanation: Both echo and print() can output text in PHP, though echo is slightly faster.

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