3v4l.org

run code in 300+ PHP versions simultaneously
<?php class RenderEngine { private $blocks = []; public function block($name, $callback) { $this->blocks[$name] = $callback; } public function draw($name, array $args) { call_user_func_array($this->blocks[$name], $args); } } $t = new RenderEngine(); ?> <?php $t->block('article', function ($article) { ?> <?=$article;?> <?php }); ?> <?=$t->draw('article', ['hello']);?>
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
hello

preferences:
171.78 ms | 404 KiB | 227 Q