php-development

name	php-development
description	Modern PHP programming skill - master PHP 8.x syntax, OOP, type system, and Composer

This skill provides comprehensive training in modern PHP development, from basic syntax to advanced PHP 8.4 features.

Code Examples

Beginner: Basic Syntax

<?php
declare(strict_types=1);

// Variables and types
$name = 'PHP Developer';
$version = 8.3;

// Match expression (PHP 8.0+)
$status = match($code) {
    200 => 'OK',
    404 => 'Not Found',
    default => 'Unknown',
};

Intermediate: OOP Patterns

<?php
declare(strict_types=1);

// Constructor property promotion (PHP 8.0+)
final readonly class User
{
    public function __construct(
        public int $id,
        public string $email,
        public string $name,
    ) {}
}

Advanced: PHP 8.4 Features

<?php
declare(strict_types=1);

// Property hooks (PHP 8.4+)
class Temperature
{
    public float $celsius {
        get => $this->celsius;
        set => $value >= -273.15 ? $value : throw new \InvalidArgumentException();
    }

    public float $fahrenheit {
        get => $this->celsius * 9/5 + 32;
        set => $this->celsius = ($value - 32) * 5/9;
    }
}

Troubleshooting

Common Issues

Problem	Cause	Solution
Type errors	Strict types + wrong type	Check function signature, cast values
Autoloading failures	PSR-4 mismatch	Verify namespace, run composer dump-autoload
Deprecated features	Old PHP patterns	Update to modern syntax

Quality Metrics

Metric	Target
Code example accuracy	100%
PHP version correctness	100%
PSR-12 compliance	100%