Types

This document attempts to show all the types that Phpactor supports.

For more information about types see:

• Official PHP Documentation

• PHPStan Types

• Psalm Types

Basic Types

Name	Example	PHP	Phpactor
Array	array	*	✔
Boolean	bool	*	✔
Float	float	*	✔
Int	int	*	✔
Resource	(internal type)	*	✔
String	string	*	✔
Self	self	*	✔
Parent	parent	*	✔
Callable	callable	*	✔
Iterable	iterable	7.1	✔
Nullable	?Foor	7.1	✔
Object	object	7.2	✔
Union	Foo|Bar	8.0	✔
Mixed	mixed	8.0	✔
Intersection	Foo&Bar	8.1	✔

Return Only Types

Name	Example	PHP	Phpactor	Notes
Void	void	7.4+	✔
Static	static	8.0	✔
Never	never	8.1+	✔
False	false	8.2+	✔	Pseudo-type before 8.2
Null	null	8.2+	✔

Docblock Types

Name	Example	Phpactor
Array Key	array-key	✔
Array Literal	array{string,int}	✔
Array Shape	array{foo:string,baz:int}	✔
List Syntax	string[]	✔
Class String	class-string<T>	✔
Closure	Closure(string, int): void	✔
Float Literal	1234.12	✔
Generics	Foobar<Barfoo>	✔
Int Literal	1234	✔
Int Range	int<0,max>	✔
Int Positive	positive-int	✔
Int Negative	negative-int	✔
List	list<string>	✔
Parenthesized	(Foo&Bar)|object	✔
String Literal	"hello"	✔
This	$this (same as static)	✔

Integer Types

Example	PHP	Supported	Description
123	*	✔	Integer
0b0110	*	✔	Binary type
0x1a	*	✔	Hexidecimal
0123	*	✔	Octal
123_123	7.4	✔	Decimal
0o123	8.1	✘	Octal

Conditional Types

Phpactor undestands conditional return types of the form:

/**
 * @return (
 *     $array is array<int>
 *     ? int
 *     : ($array is array<float>
 *         ? float
 *         : float|int
 *     )
 * )
 */
function array_some(array $array) {
    return array_sum($array);
}

Generic Types

Phpactor understands Generic (or templated) types. See PHPStan or Psalm documentation for what these are and how they work.

Phpactor supports:

• @implements and @extends in addition to @template-extends and @template-implements.

• @template and @template T of Foo

• Injecting template variables into the constructor.

• Method level template vars.

• class-string<T>

For example:

<?php

/**
 * @template T
 */
class Foo {
    /**
     * @var T
     */
    private $a;

    /** @param T $a */
    public function __construct($a) {
        $this->a = $a;
    }

    /**
     * @return T
     */
    public function a()
    {
        return $this->a;
    }
}

$f = new Foo(new Bar());
$bar = $f->a(); // Phpactor now knows that `$bar` is Bar

In addition Phpactor supports class-string<T> which allows you to capture a class type from a class string (e.g. MyClass::class is interpreted as a class-string. The following extract is from the Phpactor Container.

<?php

interface Container
{
    /**
     * @template T of object
     * @param class-string<T>|string $id
     * @return ($id is class-string<T> ? T : mixed)
     */
    public function get($id);
}

The conditional type enables the return value of get to be an object of class T if the $id is a class-string or mixed in any other case.