Validator overview

Create validators through Rule rather than calling constructors directly. Every page in this section contains its public construction method and a working example.

Validator matrix

Rule method	Validator	Best for
`string()`	`StringValidator`	Text and labels
`boolean()`	`BooleanValidator`	Strict booleans
`number()`	`NumberValidator`	Numeric values and ranges
`integer()`	`IntegerValidator`	Strict integers
`decimal()`	`DecimalValidator`	Strict floats
`email()`	`EmailValidator`	Email addresses
`phoneNumber()`	`PhoneNumberValidator`	Phone numbers
`password()`	`PasswordValidator`	Password strength
`dateTime()`	`DateTimeValidator`	Dates and times
`url()`	`UrlValidator`	URLs
`uuid()`	`UuidValidator`	UUID strings
`ipAddress()`	`IpAddressValidator`	IPv4 and IPv6
`regex()`	`RegexValidator`	Custom formats
`array()` / `arrayOf()`	`ArrayValidator`	Arrays and per-item rules
`enum()`	`EnumValidator`	Enum values and instances
`file()`	`FileValidator`	General uploads
`image()`	`ImageValidator`	One image upload
`images()`	`ImagesValidator`	Multiple image uploads
`object()`	`ObjectValidator`	Nested DTOs
`objectArray()`	`ObjectArrayValidator`	Arrays of DTOs
`username()`	`UsernameValidator`	Usernames and uniqueness

Shared behavior

use Fynix\Rule;

$validator = Rule::string('displayName')
    ->label('Display name')
    ->length(2, 80)
    ->in(['Alice', 'Bob']);

$first = $validator->validateField('A');
$all = $validator->validateFieldAll('A');

Shared methods include label(), required(), optional(), in(), notIn(), sameAs(), differentFrom(), conditional requiredness, and prohibited-field constraints. Fluent methods are immutable and return new validator instances.

Generic validation

Use withoutGenericValidation() when a specialized validator must bypass the shared requiredness, HTML, and length layer. File and array validators manage their own structure checks.