<?php
$name = "World";
echo "Hello, $name!\n";
echo "PHP " . PHP_VERSION . " running on " . PHP_OS . "\n";
$pi = M_PI;
printf("Pi is approximately %.4f\n", $pi);

<?php
$name = "World";
echo "Hello, $name!\n";
echo "PHP " . PHP_VERSION . " running on " . PHP_OS . "\n";
$pi = M_PI;
printf("Pi is approximately %.4f\n", $pi);

<?php
for ($i = 1; $i <= 20; $i++) {
    echo match(true) {
        $i % 15 === 0 => "FizzBuzz",
        $i % 3  === 0 => "Fizz",
        $i % 5  === 0 => "Buzz",
        default        => (string)$i,
    } . "\n";
}

<?php
for ($i = 1; $i <= 20; $i++) {
    echo match(true) {
        $i % 15 === 0 => "FizzBuzz",
        $i % 3  === 0 => "Fizz",
        $i % 5  === 0 => "Buzz",
        default        => (string)$i,
    } . "\n";
}

<?php
$users = [
    ["name" => "Alice", "age" => 28],
    ["name" => "Bob",   "age" => 16],
    ["name" => "Carol", "age" => 34],
];

$adults = array_filter($users, fn($u) => $u["age"] >= 18);
$names  = array_column(array_values($adults), "name");

<?php
$users = [
    ["name" => "Alice", "age" => 28],
    ["name" => "Bob",   "age" => 16],
    ["name" => "Carol", "age" => 34],
];

$adults = array_filter($users, fn($u) => $u["age"] >= 18);
$names  = array_column(array_values($adults), "name");
usort($adults, fn($a, $b) => $a["age"] <=> $b["age"]);

echo "Adults: " . implode(", ", $names) . "\n";
foreach ($adults as $u) {
    echo "  {$u['name']} — {$u['age']}\n";
}

<?php
class BankAccount {
    private float $balance;
    private array $log = [];

    public function __construct(
        public readonly string $owner,
        float $initial = 0.0
    ) {

<?php
class BankAccount {
    private float $balance;
    private array $log = [];

    public function __construct(
        public readonly string $owner,
        float $initial = 0.0
    ) {
        $this->balance = $initial;
    }

    public function deposit(float $amt): void {
        $this->balance += $amt;
        $this->log[] = "+{$amt}";
    }

    public function withdraw(float $amt): bool {
        if ($amt > $this->balance) return false;
        $this->balance -= $amt;
        $this->log[] = "-{$amt}";
        return true;
    }

    public function summary(): string {
        return "{$this->owner}: ₹{$this->balance} | " . implode(", ", $this->log);
    }
}

$acc = new BankAccount("Nishu", 1000.0);
$acc->deposit(500);
$acc->withdraw(200);
echo $acc->summary();

<?php
$text = "Contact info@example.com or support@phpforge.dev for help.";

preg_match_all(
    '/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/',
    $text,
    $matches
);

<?php
$text = "Contact info@example.com or support@phpforge.dev for help.";

preg_match_all(
    '/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/',
    $text,
    $matches
);

echo "Emails found:\n";
foreach ($matches[0] as $email) {
    echo "  ✓ $email\n";
}

$phones = ["9876543210", "123", "+91-98765"];
foreach ($phones as $p) {
    $ok = preg_match('/^\d{10}$/', $p) ? "valid" : "invalid";
    echo "$p → $ok\n";
}

<?php
header("Content-Type: application/json");

function apiResponse(array $data, int $code = 200, string $msg = "OK"): void {
    http_response_code($code);
    echo json_encode([
        "status"  => $code,
        "message" => $msg,
        "data"    => $data,

<?php
header("Content-Type: application/json");

function apiResponse(array $data, int $code = 200, string $msg = "OK"): void {
    http_response_code($code);
    echo json_encode([
        "status"  => $code,
        "message" => $msg,
        "data"    => $data,
        "ts"      => time(),
    ], JSON_PRETTY_PRINT);
    exit;
}

$users = [
    ["id" => 1, "name" => "Nishu", "role" => "admin"],
    ["id" => 2, "name" => "Alice", "role" => "user"],
];

apiResponse($users);

<?php
$password = "MySecret@123";

// Hash with bcrypt cost 12
$hash = password_hash($password, PASSWORD_BCRYPT, ["cost" => 12]);
echo "Hash: $hash\n\n";

// Verify
$attempts = [$password, "WrongPass", "MySecret@123"];

<?php
$password = "MySecret@123";

// Hash with bcrypt cost 12
$hash = password_hash($password, PASSWORD_BCRYPT, ["cost" => 12]);
echo "Hash: $hash\n\n";

// Verify
$attempts = [$password, "WrongPass", "MySecret@123"];
foreach ($attempts as $attempt) {
    $ok = password_verify($attempt, $hash) ? "✓ VALID" : "✗ WRONG";
    echo "\"$attempt\" → $ok\n";
}

// Check if rehash needed
if (password_needs_rehash($hash, PASSWORD_BCRYPT, ["cost" => 14])) {
    echo "\nRehash recommended for higher security";
}

<?php
class UserRepository {
    public function __construct(private PDO $pdo) {}

    public function findById(int $id): ?array {
        $stmt = $this->pdo->prepare("SELECT * FROM users WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->fetch() ?: null;
    }

<?php
class UserRepository {
    public function __construct(private PDO $pdo) {}

    public function findById(int $id): ?array {
        $stmt = $this->pdo->prepare("SELECT * FROM users WHERE id = ?");
        $stmt->execute([$id]);
        return $stmt->fetch() ?: null;
    }

    public function create(string $name, string $email): int {
        $stmt = $this->pdo->prepare(
            "INSERT INTO users (name, email, created_at) VALUES (?, ?, NOW())"
        );
        $stmt->execute([$name, $email]);
        return (int)$this->pdo->lastInsertId();
    }

    public function findAll(int $limit = 20): array {
        $stmt = $this->pdo->prepare(
            "SELECT id, name, email FROM users ORDER BY created_at DESC LIMIT ?"
        );
        $stmt->execute([$limit]);
        return $stmt->fetchAll();
    }
}

// $repo = new UserRepository($pdo);
// $user = $repo->findById(1);