PHP Type
********

.[perex]
[api:Nette\Utils\Type] is a PHP data type class.

Installation:

```shell
composer require nette/utils
```

All examples assume the following class alias is defined:

```php
use Nette\Utils\Type;
```


fromReflection($reflection): ?Type .[method]
--------------------------------------------

The static method creates a Type object based on reflection. The parameter can be a `ReflectionMethod` or `ReflectionFunction` object (returns the type of the return value) or a `ReflectionParameter` or `ReflectionProperty` object. Resolves `self`, `static` and `parent` to the actual class name. If the subject has no type, it returns `null`.

```php
class DemoClass
{
	public self $foo;
}

$prop = new ReflectionProperty(DemoClass::class, 'foo');
echo Type::fromReflection($prop); // 'DemoClass'
```


fromString(string $type): Type .[method]
----------------------------------------

The static method creates the Type object according to the text notation.

```php
$type = Type::fromString('Foo|Bar');
echo $type;      // 'Foo|Bar'
```


getNames(): (string|array)[] .[method]
--------------------------------------

Returns the array of subtypes that make up the compound type as strings.

```php
$type = Type::fromString('string|null'); // nebo '?string'
$type->getNames();  // ['string', 'null']

$type = Type::fromString('(Foo&Bar)|string');
$type->getNames();  // [['Foo', 'Bar'], 'string']
```


getTypes(): Type[] .[method]
----------------------------

Returns the array of subtypes that make up the compound type as `Type` objects:

```php
$type = Type::fromString('string|null'); // or '?string'
$type->getTypes();  // [Type::fromString('string'), Type::fromString('null')]

$type = Type::fromString('(Foo&Bar)|string');
$type->getTypes();  // [Type::fromString('Foo&Bar'), Type::fromString('string')]

$type = Type::fromString('Foo&Bar');
$type->getTypes();  // [Type::fromString('Foo'), Type::fromString('Bar')]
```


getSingleName(): ?string .[method]
----------------------------------

Returns the type name for simple types, otherwise null.

```php
$type = Type::fromString('string|null');
echo $type;                       // '?string'
echo $type->getSingleName();      // 'string'

$type = Type::fromString('?Foo');
echo $type;                       // '?Foo'
echo $type->getSingleName();      // 'Foo'

$type = Type::fromString('Foo|Bar');
echo $type;                       // 'Foo|Bar'
echo $type->getSingleName();      // null
```


isSimple(): bool .[method]
--------------------------

Returns whether it is a simple type. Simple nullable types are also considered to be simple types:

```php
$type = Type::fromString('string');
$type->isSimple();       // true
$type->isUnion();        // false

$type = Type::fromString('?Foo'); // nebo 'Foo|null'
$type->isSimple();       // true
$type->isUnion();        // true
```


isUnion(): bool .[method]
-------------------------

Returns whether it is a union type.

```php
$type = Type::fromString('Foo&Bar');
$type->isUnion();        // true
```


isIntersection(): bool .[method]
--------------------------------

Returns whether it is an intersection type.


```php
$type = Type::fromString('string&int');
$type->isIntersection(); // true
```


isBuiltin(): bool .[method]
---------------------------

Returns whether the type is both a simple and a PHP built-in type.

```php
$type = Type::fromString('string');
$type->isBuiltin(); // true

$type = Type::fromString('string|int');
$type->isBuiltin(); // false

$type = Type::fromString('Foo');
$type->isBuiltin(); // false
```


isClass(): bool .[method]
-------------------------

Returns whether the type is both a simple and a class name.

```php
$type = Type::fromString('string');
$type->isClass();   // false

$type = Type::fromString('Foo|null');
$type->isClass();   // true

$type = Type::fromString('Foo|Bar');
$type->isClass();   // false
```


isClassKeyword(): bool .[method]
--------------------------------

Determine whether the type is one of the internal types `self`, `parent`, `static`.

```php
$type = Type::fromString('self');
$type->isClassKeyword();   // true

$type = Type::fromString('Foo');
$type->isClassKeyword();   // false
```


allows(string $type): bool .[method]
------------------------------------

The `allows()` method verifies type compatibility. For example, it allows to check if a value of a certain type could be passed as a parameter.

```php
$type = Type::fromString('string|null');
$type->allows('string'); // true
$type->allows('null');   // true
$type->allows('Foo');    // false

$type = Type::fromString('mixed');
$type->allows('null');   // true
```