Course/Module 7/Topic 1 of 3Intermediate

Object-Oriented PHP - Concepts

Explore the key concepts of object-oriented php with practical examples and exercises.

45 min•By Priygop Team•Last updated: Feb 2026

Introduction to Object-Oriented PHP

In this section, we cover the fundamental aspects of object-oriented php. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.

Key Concepts

Understanding the core principles of object-oriented php
Practical applications and real-world use cases
Step-by-step implementation guides
Common patterns and best practices
Tips for debugging and troubleshooting
Performance optimization techniques

Object-Oriented PHP - Code Example

Example

<?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 getEmail(): string { return $this->email; }
    
    public function __toString(): string {
        return "{$this->name} ({$this->email})";
    }
}

$user = new User("Alice", "alice@example.com");
echo $user . "\n";
echo $user->getName() . "\n";
?>

Try It Yourself: Object-Oriented PHP

Try It Yourself: Object-Oriented PHPJavaScript⚠ 1 error

⚠ Syntax Issues (1)

Line 1: JS Error: Unexpected token '<'

💡 Missing or extra {}()[] or operator near the error.

JavaScript Editor

✕ 1 errorTab = 2 spaces

<?php
class Calculator {
    private float $result = 0;
    
    public function add(float $n): self { $this->result += $n; return $this; }
    public function subtract(float $n): self { $this->result -= $n; return $this; }
    public function multiply(float $n): self { $this->result *= $n; return $this; }
    public function getResult(): float { return $this->result; }
    public function reset(): self { $this->result = 0; return $this; }
}

$calc = new Calculator();
$result = $calc->add(10)->multiply(3)->subtract(5)->getResult();
echo "Result: $result\n"; // 25

$calc->reset()->add(100)->multiply(0.1)->getResult();
echo "Result: {$calc->getResult()}\n";
?>

Result

Click ▶ Run to see the result

Edit the code on the left, then click Run

JavaScript|18 lines|666 chars|1 error, 0 warnings

UTF-8

Quick Quiz: Object-Oriented PHP

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