Validation Framework

Feature Requirements

1. Easy to use
2. Easy to extend
3. Basic functionality

Installation

composer require crtl/validation

Usage

use Crtl\Validation\Custom\Rule as CustomRule;

require_once(__DIR__ . "/vendor/autoload.php");

$validator = new Crtl\Validation\Validator([
    "ruleName" => ["fieldName1", ..., "fieldNameN"],
    "ruleName" => ["fieldName" => "configValue"],
    "ruleName" => ["fieldName" => ["config1", "config"]],
    CustomRule::class => ["fieldName", ...]
]);


if (!$validator->validate($data)) {
    $errors = $validator->getErrors();
}

Built In Rules

• required
• boolean
• number
• float
• int
• min [value, exclusive:bool=false]
• max [value, exclusive:bool=false]
• string
• length
• minLength [value, exclusive:bool=false]
• maxLength [value, exclusive:bool=false]
• array
• count
• maxCount [value, exclusive:bool=false]
• minCount [value, exclusive:bool=false]
• email
• ip
• ipv6
• ipv4
• alnum
• digit
• mac
• domain
• url
• pattern
• equals [value, strict:bool=false]

Define Custom Validation Rules

To define custom validation rules you can either implement the Crtl\Validation\RuleInterface or the Crtl\Validation\SingleInstanceRuleInterface.

The Crtl\Validation\SingleInstanceRuleInterface will be only instantiated once.

class UniqueDbColumnRule implements \Crtl\Validation\RuleInterface {

    protected $connection;
    protected $table;
    protected $column;

    public function __construct(array $config) {
        $this->connection = $config[0] ?? null;
        $this->table = $config[0] ?? null;
        $this->column = $config[0] ?? null;
    }
    
    public function getName() {
        return self::class;
    }
    
    public function validate($value): bool {
        $stmt = $this->db->prepare(
            sprintf("SELECT %$2s FROM %$s WHERE %$2s=? LIMIT 1;", $this->table, $this->column)
        );
        
        $stmt->bindValue(1, $value);
        $stmt->execute();
        return $stmt->rowCount() === 0;
    }

}

$validator = new Crtl\Validation\Validator([
    UniqueDbColumnRule::class => [
        "username" => [$db, "users", "username"],
        "email" => [$db, "users", "email"]
    ]
]);

$validator->validate($data);

Errors

Errors can be retrieved by calling Crtl\Validation\Validator::getErrors. Errors are resetted by calling Crtl\Validation\Validator::validate.

Crtl\Validation\Validator::getErrors returns an array with the following format:

[
   "fieldName" => ["validatorName1", "validatorName2", ...],
   ...
]