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run code in 300+ PHP versions simultaneously
<?php class Foo { private $callable; public function __construct() { $this->callable = function(){echo 'ciao mondo';}; } public function yesItDoes() { try { $this->callable->call($this); } catch (Error $e) { call_user_func($this->callable); } } } (new Foo)->yesItDoes();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
ciao mondo
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined method Closure::call() in /in/1OMfH on line 13
Process exited with code 255.

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