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run code in 300+ PHP versions simultaneously
<?php $Foo = call_user_func(function() { $a = function() { return 'hello'; }; $b = function() { return 'world'; }; return (object)array( 'a' => $a, 'b' => $b, ); }); echo implode(' ', array(($Foo->a)(), ($Foo->b)()));

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