3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { yield ['a' => 1] => [1]; yield function() {} => [2]; } foreach(foo() as $key => $value) { print_r($key); print_r($value); } ?>
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [a] => 1 ) Array ( [0] => 1 ) Closure Object ( ) Array ( [0] => 2 )

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87.43 ms | 402 KiB | 91 Q