Union Types
A collection of different datatypes in the same memory location.
declare(strict_types=1);
/**
* Union Types
*
* Prior to PHP 8.0 you could only declare a single type for ...
* properties, parameters, and return types.
*
* To separate each datatype use pipe |
*
* ?string - equivalent with string|null
*/
class A
{
private static int|float $i = 10; // Look Here
public function add(int|float $n, ?string $name)
{
self::$i += $n;
}
public function get(): int|float
{
return self::$i;
}
}
$a = new A();
$a->add(10, "one");
echo $a->get(); // 20
$a->add(2.2, NULL);
echo $a->get(); // 22.2
Match
Match expression improves the switch syntax in multiple ways.
/**
* Match expression
*
* Match syntax improves the switch syntax in multiple ways:
* - returns value
* - multiple matching conditions allowed
* - implicit break
* - strict matching (value and type)
*/
class B
{
public String $request_method = 'GET';
public function __construct(String $request_method)
{
$result = match($request_method) { // Look Here
'POST' => $this->handle_post(),
'GET', 'HEAD' => $this->handle_get(),
default => throw new \Exception('Unsupported'),
};
echo $result;
}
private function handle_post(): String
{
return 'This is POST';
}
private function handle_get(): String
{
return 'This is GET';
}
}
try {
new B('POST'); // This is POST
new B('GET'); // This is GET
new B('HEAD'); // This is GET
new B('HTTP');
} catch(Exception $e) {
echo $e->getMessage(); // Unsupported
}
Last update: 580 days ago
