Key Takeaway: Practice PHP programming with 84+ practical code examples covering syntax, arrays, strings, functions, OOP, JSON, and file handling — all with expected terminal outputs.
Audience & Use Case: Designed for web developers, backend engineers, Laravel developers, computer science students, and interview candidates mastering modern PHP.
Who is this for: Web developers, Laravel learners, API engineers, and CS students.
Related Tools:PHP Compiler · PHP Official Manual · JavaScript Examples · Python Examples
Overview and sample Controller/Model architecture structure for CodeIgniter framework.
<?php
namespace App\Controllers;
class Home {
public function index() {
$data = ['title' => 'Welcome to CodeIgniter 4'];
return "Controller Response: " . $data['title'];
}
}
$controller = new Home();
echo $controller->index() . "\n";
?>Controller Response: Welcome to CodeIgniter 4
Defines a PHP class with properties, constructor, and methods.
<?php
class Car {
public $brand;
public $model;
public function __construct($brand, $model) {
$this->brand = $brand;
$this->model = $model;
}
public function getDetails() {
return "Car: {$this->brand} {$this->model}";
}
}
$myCar = new Car("Toyota", "Corolla");
echo $myCar->getDetails() . "\n";
?>Car: Toyota Corolla
Illustrates OOP inheritance using extends keyword and protected properties.
<?php
class Animal {
protected $name;
public function __construct($name) {
$this->name = $name;
}
}
class Dog extends Animal {
public function bark() {
return "{$this->name} says: Woof Woof!";
}
}
$dog = new Dog("Buddy");
echo $dog->bark() . "\n";
?>Buddy says: Woof Woof!
Architecture and CRUD implementation for a PHP grocery store application.
<?php
class GroceryStore {
private $products = [
1 => ['name' => 'Organic Apples', 'price' => 2.99, 'stock' => 50],
2 => ['name' => 'Whole Milk 1L', 'price' => 1.49, 'stock' => 30],
3 => ['name' => 'Whole Wheat Bread', 'price' => 2.29, 'stock' => 20]
];
public function getProducts() {
return $this->products;
}
public function addToCart($productId, $quantity) {
if (isset($this->products[$productId])) {
$item = $this->products[$productId];
$total = $item['price'] * $quantity;
return "Added {$quantity}x {$item['name']} to cart. Total: \${$total}";
}
return "Product not found.";
}
}
$store = new GroceryStore();
echo $store->addToCart(1, 3) . "\n";
?>Added 3x Organic Apples to cart. Total: $8.97
| Domain | Core Concepts | Primary Use Case | Official Docs |
|---|---|---|---|
| Variables & Types | $var, string, int, bool | Variables, string concatenation, type declarations | PHP Types |
| Arrays & Data | Indexed arrays, Associative ['key' => 'val'] | Key-value mappings, list iteration with foreach | PHP Arrays |
| Functions | function name(type $param): returnType | Modular code, default arguments, return value typing | PHP Functions |
| OOP Constructs | class, extends, public/protected | Encapsulation, constructors, inheritance, web frameworks | PHP OOP |
Use the online PHP compiler to test snippet modifications, test array manipulation logic, and build custom functions for backend applications.
[], and standard OOP paradigms compatible with PHP 7.4 through PHP 8.x and frameworks such as Laravel and Symfony. PHP powers over 75% of the active web today. Practicing short, clear programs is the most efficient path to mastering PHP backend development. Each snippet focuses on a fundamental building block — from basic variable output and control structures to complex associative arrays, JSON serialization, and object-oriented design.
Learn echo syntax, variable assignment, type coercion, and simple arithmetic operations.
Master key-value arrays, foreach loops, function type hints, and string/math helpers.
Explore classes, inheritance, visibility, JSON APIs, and file read/write operations.