PHP 8 in 8 code blocks
source link: https://stitcher.io/blog/php-8-in-8-code-blocks
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PHP 8 brings lots of new features, in this list we'll look at the most outstanding ones. If you want a full list and background information, you can read about all thingsnew in PHP 8.
use \Support\Attributes\ListensTo; class ProductSubscriber { <<ListensTo(ProductCreated::class)>> public function onProductCreated(ProductCreated $event) { /* … */ } <<ListensTo(ProductDeleted::class)>> public function onProductDeleted(ProductDeleted $event) { /* … */ } }
Attributes — aka annotations — you can about them in depth inthis post.
public function foo(Foo|Bar $input): int|float; public function bar(mixed $input): mixed;
Union types allows for type hinting several types. There's also a new mixed
type which representsseveral types at once.
interface Foo { public function bar(): static; }
The static
return type is built-in.
[JIT] opcache.jit=5
The just-in-time compiler for PHP.
$triggerError = fn() => throw new MyError(); $foo = $bar['offset'] ?? throw new OffsetDoesNotExist('offset');
throw
can be used in expressions.
try { // Something goes wrong } catch (MySpecialException) { Log::error("Something went wrong"); }
Non-capturing catches: no need to specify an exception variable if you don't need it.
public function( string $parameterA, int $parameterB, Foo $objectfoo, ) { // … }
Trailing commas are allowed in parameter lists
str_contains('string with lots of words', 'words'); str_starts_with('haystack', 'hay'); str_ends_with('haystack', 'stack');
New string functions.
Let's not fool ourselves: 8 code blocks isn't enough to summarise all great new things in PHP 8. So let's just add a few more.
function bar(Stringable $stringable) { /* … */ }
A new
Stringable
interface
.
$object::class
Call ::class
directly on objects.
There's even more. If you want a full list, you can find iton this blog.
What feature are you looking forward to the most? Let me know on Twitter or viaemail.
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