Validator php component

This is easy-to-use php component for validate POST or GET data in your project. See index.php for examples.

Public methods:

• check() - inits validation with rules
• setDB() - sets DB connection (using QueryBuilder class)
• errors() - returns an array of validation's errors
• passed() - returns result of validation (true or false)

Supported rules:

• required - true/false
• min - minimal length of value
• max - maximal length of value
• matches - compares 2 fields
• int - check integer type
• min_value - minimal value of integer
• max_value - maximal value of integer
• unique - looking for this value in DB
• email - check email correct format
• regex - any RegEx checking

How to use

1. Include Validator class and init it. If you use unique rule you have to include QueryBuilder class also (see QueryBuilder README).

require __DIR__ . '/Validator/Validator.php';
$validator = new Validator();

or

$config = require __DIR__ . '/QueryBuilder/config.php';
require __DIR__ . '/QueryBuilder/Connection.php';
require __DIR__ . '/QueryBuilder/QueryBuilder.php';
require __DIR__ . '/Validator/Validator.php';

$query = new QueryBuilder(Connection::make($config['database']));
$validator = new Validator($query);

2. Use check() method with rules you need.

$validator->check($_POST, [
	'username'  =>  [
		'required'  =>  true,
		'min'   =>  2,
		'max'   =>  15,
	],
	'email' =>  [
		'required'  =>  true,
		'email' =>  true,
		'unique'    =>  'users'
	],
	'password' => [
		'required'  =>  true,
		'min'   =>  3
	],
	'password_again' => [
		'required'  =>  true,
		'matches'   => 'password'
	],
	'number'  =>  [
		'required'  =>  true,
		'max'   =>  5,
		'min_value'   =>  0,
		'max_value'   =>  15,
	],
	'date' => [
		'required'  =>  true,
		'regex' => "/^[0-9]{4}-[0-1][0-9]-[0-3][0-9]$/" // YYYY-MM-DD
	],
	'agree' => [
		'required'  =>  true,
	]
]);

form example:

<form action="" method="post" enctype="multipart/form-data">
	<input type="text" name="username" value="<?= $_POST['username'] ?? ''; ?>"><br>
	<input type="email" name="email" value="<?= $_POST['email'] ?? ''; ?>"><br>
	<input type="password" name="password" value="<?= $_POST['password'] ?? ''; ?>"><br>
	<input type="password" name="password_again" value="<?= $_POST['password_again'] ?? ''; ?>"><br>
	<input type="number" name="number" value="<?= $_POST['number'] ?? ''; ?>"><br>
	<input type="text" name="date" value="<?= $_POST['date'] ?? ''; ?>" placeholder="YYYY-MM-DD"><br>
	<input type="checkbox" name="agree" <?= isset($_POST['agree']) && !empty($_POST['agree']) ? 'checked' : '' ?>> I agree<br>
	<input type="submit" value="Send">
</form>

3. Do something if validation is passed or print errors.

if ($validator->passed()) {
	// do something
} else {
	echo '<ul>';
	foreach ($validator->errors() as $error) {
		echo "<li>$error</li>";
	}
	echo '</ul>';
}