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93d826e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | <?php
declare(strict_types=1);
namespace Example;
use DateTime;
use Exception;
use InvalidArgumentException;
use JsonSerializable;
use Psr\Log\LoggerInterface;
// Interface definition
interface DataProcessor
{
public function process(mixed $data): mixed;
public function validate(mixed $data): bool;
}
// Trait definition
trait Loggable
{
protected ?LoggerInterface $logger = null;
public function setLogger(LoggerInterface $logger): void
{
$this->logger = $logger;
}
protected function log(string $message, array $context = []): void
{
$this->logger?->info($message, $context);
}
}
// Abstract class
abstract class Entity implements JsonSerializable
{
protected DateTime $createdAt;
protected ?DateTime $updatedAt = null;
public function __construct()
{
$this->createdAt = new DateTime();
}
abstract public function validate(): bool;
public function jsonSerialize(): mixed
{
return [
'createdAt' => $this->createdAt->format('c'),
'updatedAt' => $this->updatedAt?->format('c'),
];
}
}
// Enum definition (PHP 8.1+)
enum Status: string
{
case PENDING = 'pending';
case ACTIVE = 'active';
case COMPLETED = 'completed';
case FAILED = 'failed';
public function label(): string
{
return match($this) {
self::PENDING => 'Pending',
self::ACTIVE => 'Active',
self::COMPLETED => 'Completed',
self::FAILED => 'Failed',
};
}
}
// Class implementing interface and using trait
class User extends Entity implements DataProcessor
{
use Loggable;
private static int $instanceCount = 0;
public function __construct(
private string $name,
private string $email,
private Status $status = Status::PENDING,
private array $metadata = []
) {
parent::__construct();
self::$instanceCount++;
}
public static function getInstanceCount(): int
{
return self::$instanceCount;
}
// Property getter with validation
public function getEmail(): string
{
return $this->email;
}
// Property setter with validation
public function setEmail(string $email): void
{
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
throw new InvalidArgumentException('Invalid email format');
}
$this->email = $email;
$this->updatedAt = new DateTime();
}
// Magic method implementation
public function __get(string $name)
{
return $this->metadata[$name] ?? null;
}
public function __set(string $name, mixed $value): void
{
$this->metadata[$name] = $value;
}
// Interface method implementations
public function process(mixed $data): mixed
{
if (!is_array($data)) {
throw new InvalidArgumentException('Data must be an array');
}
$this->log('Processing user data', ['user' => $this->name]);
foreach ($data as $key => $value) {
$this->metadata[$key] = $value;
}
$this->status = Status::COMPLETED;
return $this;
}
public function validate(mixed $data): bool
{
return is_array($data) && !empty($data);
}
// Abstract method implementation
public function validate(): bool
{
return !empty($this->name) && !empty($this->email);
}
// Method using arrow functions (PHP 7.4+)
public function getMetadataValues(): array
{
return array_map(
fn($value) => is_array($value) ? json_encode($value) : (string)$value,
$this->metadata
);
}
// Implementation of JsonSerializable
public function jsonSerialize(): mixed
{
return [
...parent::jsonSerialize(),
'name' => $this->name,
'email' => $this->email,
'status' => $this->status->value,
'metadata' => $this->metadata,
];
}
}
// Custom exception
class ProcessingException extends Exception
{
public function __construct(
string $message = "",
private ?string $errorCode = null,
int $code = 0,
?Throwable $previous = null
) {
parent::__construct($message, $code, $previous);
}
public function getErrorCode(): ?string
{
return $this->errorCode;
}
}
// Anonymous class usage
$validator = new class {
public function validateUser(User $user): bool
{
return $user->validate();
}
};
// Example usage
try {
$user = new User("John Doe", "john@example.com");
$user->process(['role' => 'admin', 'preferences' => ['theme' => 'dark']]);
// Using magic methods
$user->customField = 'custom value';
echo $user->customField;
// JSON serialization
echo json_encode($user, JSON_PRETTY_PRINT);
} catch (Exception $e) {
echo "Error: " . $e->getMessage();
}
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