Hypothetical example of using use statement for attributes

1.attributes-with-use.php

<?php

namespace MyNamespace;

// namespace use
use WpAttributes\PrimaryKey;
use WpAttributes\PostType;
use WpAttributes\TemplateVariable;
use PHP\VirtualReadonly;

// attribute use
use PostType('abc_product'),
    TemplateVariable('product'),
    VirtualReadonly('id'),
    VirtualReadonly('name');

class Product {

	private $id;
	private $name;

	public function __construct(int $id, string $name) {
		$this->id = $id;
		$this->name = $name;
	}

	// attribute use
	use PrimaryKey();
	public function getId(): string {
		return $this->id;
	}

	public function getName(): string {
		return $this->name;
	}

	public function setName(string $name) {
		$this->name = $name;
	}

	// attribute use
	public function __get(string $name) {
		switch ($name){
			case 'id':
				return $this->id;
			case 'name':
				return $this->name;
		}
		trigger_error("invalid property '%s'", $name);
		return null;
	}

}

2.attributes-with-use-attribute.php

<?php

namespace MyNamespace;

// namespace use
use WpAttributes\PrimaryKey;
use WpAttributes\PostType;
use WpAttributes\TemplateVariable;
use PHP\VirtualReadonly;

// class attribute use
use attribute PostType('abc_product'),
              TemplateVariable('product'),
              VirtualReadonly('id'),
              VirtualReadonly('name');

class Product {

	private $id;
	private $name;

	public function __construct(int $id, string $name) {
		$this->id = $id;
		$this->name = $name;
	}

	// method attribute use
	use attribute PrimaryKey();
	public function getId(): string {
		return $this->id;
	}

	public function getName(): string {
		return $this->name;
	}

	public function setName(string $name) {
		$this->name = $name;
	}

	// attribute use
	public function __get(string $name) {
		switch ($name){
			case 'id':
				return $this->id;
			case 'name':
				return $this->name;
		}
		trigger_error("invalid property '%s'", $name);
		return null;
	}

}

3.attributes-with-at-at.php

<?php

namespace MyNamespace;

// namespace use
use WpAttributes\PrimaryKey;
use WpAttributes\PostType;
use WpAttributes\TemplateVariable;
use PHP\VirtualReadonly;


@@PostType('abc_product');
@@TemplateVariable('product');
@@VirtualReadonly('id');
@@VirtualReadonly('name');

class Product3 {

	private $id;
	private $name;

	public function __construct(int $id, string $name) {
		$this->id = $id;
		$this->name = $name;
	}

	// attribute use
	@@PrimaryKey();
	public function getId(): string {
		return $this->id;
	}

	public function getName(): string {
		return $this->name;
	}

	public function setName(string $name) {
		$this->name = $name;
	}

	// attribute use
	public function __get(string $name) {
		switch ($name){
			case 'id':
				return $this->id;
			case 'name':
				return $this->name;
		}
		trigger_error("invalid property '%s'", $name);
		return null;
	}

}

4.attributes-with-at-brackets.php

<?php

namespace MyNamespace;

// namespace use
use WpAttributes\PrimaryKey;
use WpAttributes\PostType;
use WpAttributes\TemplateVariable;
use PHP\VirtualReadonly;


@[PostType('abc_product'),
  TemplateVariable('product'),
  VirtualReadonly('id'),
  VirtualReadonly('name')]

class Product3 {

	private $id;
	private $name;

	public function __construct(int $id, string $name) {
		$this->id = $id;
		$this->name = $name;
	}

	// attribute use
	@[PrimaryKey]
	public function getId(): string {
		return $this->id;
	}

	public function getName(): string {
		return $this->name;
	}

	public function setName(string $name) {
		$this->name = $name;
	}

	// attribute use
	public function __get(string $name) {
		switch ($name){
			case 'id':
				return $this->id;
			case 'name':
				return $this->name;
		}
		trigger_error("invalid property '%s'", $name);
		return null;
	}

}

5.attributes-with-hash-brackets.php

<?php

namespace MyNamespace;

// namespace use
use WpAttributes\PrimaryKey;
use WpAttributes\PostType;
use WpAttributes\TemplateVariable;
use PHP\VirtualReadonly;


#[PostType('abc_product'),
  TemplateVariable('product'),
  VirtualReadonly('id'),
  VirtualReadonly('name')]

class Product3 {

	private $id;
	private $name;

	public function __construct(int $id, string $name) {
		$this->id = $id;
		$this->name = $name;
	}

	// attribute use
	#[PrimaryKey]
	public function getId(): string {
		return $this->id;
	}

	public function getName(): string {
		return $this->name;
	}

	public function setName(string $name) {
		$this->name = $name;
	}

	// attribute use
	public function __get(string $name) {
		switch ($name){
			case 'id':
				return $this->id;
			case 'name':
				return $this->name;
		}
		trigger_error("invalid property '%s'", $name);
		return null;
	}

}