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run code in 300+ PHP versions simultaneously
<?php $x = 1; $yy = function() use (&$x) { return $x + 1;}; $y = fn() => $x + 1; $x = 2; var_dump($y); var_dump($yy);
Output for 8.4.1 - 8.4.12
object(Closure)#2 (4) { ["name"]=> string(21) "{closure:/in/cTjsX:5}" ["file"]=> string(9) "/in/cTjsX" ["line"]=> int(5) ["static"]=> array(1) { ["x"]=> int(1) } } object(Closure)#1 (4) { ["name"]=> string(21) "{closure:/in/cTjsX:4}" ["file"]=> string(9) "/in/cTjsX" ["line"]=> int(4) ["static"]=> array(1) { ["x"]=> &int(2) } }
Output for 8.1.7 - 8.1.33, 8.2.10 - 8.2.29, 8.3.0 - 8.3.25
object(Closure)#2 (1) { ["static"]=> array(1) { ["x"]=> int(1) } } object(Closure)#1 (1) { ["static"]=> array(1) { ["x"]=> &int(2) } }

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