PHP Essentials

$cfg = ['db' => ['host' => 'localhost']];

Arr::get($cfg, 'db.host');        // "localhost"
Arr::get($cfg, 'db.port', 3306); // 3306

Arr::set($cfg, 'db.port', 3306);
Arr::has($cfg, 'db.port');     // true
Arr::forget($cfg, 'db.port');  // removed

$users = [
  ['id' => 1, 'name' => 'Alice'],
  ['id' => 2, 'name' => 'Bob'],
];
Arr::pluck($users, 'name');
// ["Alice", "Bob"]

Arr::pluck($users, 'name', 'id');
// [1 => "Alice", 2 => "Bob"]

$items = [
  ['type' => 'fruit', 'name' => 'Apple'],
  ['type' => 'veg',   'name' => 'Carrot'],
];
Arr::groupBy($items, 'type');
// ["fruit" => [...], "veg" => [...]]

$d = ['name'=>'Jo', 'email'=>'[email protected]', 'pass'=>'s'];

Arr::only($d, ['name', 'email']);
// ["name" => "Jo", "email" => "[email protected]"]

Arr::except($d, ['pass']);
// ["name" => "Jo", "email" => "[email protected]"]

Arr::flatten([[1, [2]], [3]]); // [1, 2, 3]

Arr::sortBy($users, 'name', 'desc');
Arr::where($users, 'role', 'admin');
Arr::uniqueBy($users, 'email');

Arr::first($users, fn($u) => $u['age'] > 18);
Arr::last($users); // last element

Arr::paginate($items, 10, 2);
// ["data" => [...], "total" => 50,
//  "current_page" => 2, "has_next" => true]

Date::ago('2025-12-30 10:00:00');
// "2mo ago"

Date::ago(new DateTime('-5 minutes'));
// "5m ago"

Date::diff('2025-01-01', '2025-03-15', 'days');
// 73

Date::diff('2020-01-01', '2025-06-01', 'months');
// 65

Date::range('2025-01-01', '2025-01-05');
// ["2025-01-01", "2025-01-02", ...]

Date::range('2025-01', '2025-06', '+1 month', 'Y-m');
// ["2025-01", "2025-02", ...]

Date::isValid('2025-02-29');  // false
Date::isWeekend('2025-03-01'); // true (Sat)
Date::age('1990-05-15');       // 35

Date::format('2025-03-15', 'F j, Y');
// "March 15, 2025"

Date::startOfDay(); // "2025-03-03 00:00:00"
Date::fromNow('2026-12-25'); // "in 42w"

Validate::email('[email protected]'); // true
Validate::url('https://x.com');      // true
Validate::ip('192.168.1.1');         // true
Validate::ipv6('::1');                // true

Validate::password('weak');
// ["Must be at least 8 characters",
//  "Must contain an uppercase letter"]

Validate::password('Strong1Pass');
// [] ← empty = valid

Validate::creditCard('4111111111111111');
// true (valid Luhn)

Validate::creditCard('1234567890');
// false

Validate::between(5, 1, 10);         // true
Validate::length('hello', 2, 10);      // true
Validate::regex('abc123', '/^\w+$/');  // true
Validate::json('{"a":1}');             // true

Validate::hexColor('#ff0');     // true
Validate::phone('+1-555-1234'); // true
Validate::slug('my-post-123');  // true
Validate::date('2025-13-01');   // false

$hash = Secure::hashPassword('myPassword');
Secure::verifyPassword('myPassword', $hash);
// true

Secure::needsRehash($oldHash);
// true if algo/cost changed

$enc = Secure::encrypt('secret', 'key');
$plain = Secure::decrypt($enc, 'key');
// "secret"

Secure::token(32);
// "a1b2c3d4e5...64 hex chars"

Secure::uuid();
// "550e8400-e29b-41d4-a716-446655440000"

$sig = Secure::sign('payload', 'secret');
Secure::verifySignature('payload', $sig, 'secret');
// true

$token = Secure::csrfToken();
Secure::verifyCsrf($_POST['token']); // bool

Secure::escape('<script>x</script>');
// safe HTML entity output

Secure::sanitizeFilename('../../etc/passwd');
// "passwd"

$r = Http::get('https://api.example.com/users');
// $r['status']  → 200
// $r['json']    → decoded array
// $r['headers'] → parsed headers

$r = Http::post('https://api.example.com/users', [
    'name'  => 'Alice',
    'email' => '[email protected]',
], ['Authorization: Bearer tok']);

Http::buildUrl('https://api.example.com/search', [
    'q'    => 'php essentials',
    'page' => 2,
]);
// ".../search?q=php+essentials&page=2"

Http::clientIp();
// "203.0.113.42"

Http::isAjax();
// true if X-Requested-With header set

Http::json(['success' => true], 200);
// Sends JSON + exits

Http::redirect('/dashboard', 302);
// 302 redirect + exits

File::write('/tmp/data/log.txt', 'Hello');
// Creates /tmp/data/ if needed

$content = File::read('/tmp/data/log.txt');
// "Hello" (or null if missing)

File::append('/tmp/data/log.txt', "\nWorld");
File::delete('/tmp/data/log.txt');

File::size('/var/log/app.log');  // "2.34 MB"
File::extension('photo.JPG');   // "jpg"
File::mimeType('photo.jpg');    // "image/jpeg"
File::exists('/tmp/data.txt');  // true/false

File::writeJson('/tmp/config.json', [
    'debug'   => false,
    'version' => '1.0.0',
]);

$cfg = File::readJson('/tmp/config.json');
// ["debug" => false, "version" => "1.0.0"]

// users.csv: name,email
//            Alice,[email protected]

File::readCsv('users.csv');
// [["name"=>"Alice", "email"=>"[email protected]"]]

File::list('/var/uploads', '*.jpg');
// ["/var/uploads/photo1.jpg", ...]

File::listRecursive('/app/src', '*.php');
// all PHP files recursively

File::copy('a.txt', 'backup/a.txt');
File::move('old.txt', 'archive/old.txt');