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@ 2021-12-14T11:17:46Z

<?php

final class Div
{
    private array $content = [];
    
    private function __construct()
    {
    }
    
    public static function tag(): self
    {
        return new self();
    }
    
    public function content(... $content)
    {
        $new = clone $this;
        $new->content = array_values($content);
        return $new;
    }
    
    private function render(): string
    {
        $content = '';

        foreach ($this->content as $item) {
            if ($item instanceof Generator) {
                foreach ($item as $genItem) {
                    $content .= $genItem;
                }
            } else {
                $content .= $item;
            }
        }

        return '<div>' . $content . '</div>';
    }
    
    
    final public function __toString(): string
    {
        return $this->render();
    }
    
}

$items = ['blue', 'green', 'red'];

echo Div::tag()->content(
    'Collors', 
    '<br>', 
    (static function() use ($items): Generator
    {
        foreach ($items as $item) {
            yield Div::tag()->content($item);
        }
    })()
    );

Output for git.master, git.master_jit, rfc.property-hooks: <div>Collors<br><div>blue</div><div>green</div><div>red</div></div>

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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