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<?php $execute = function ($n){ foreach($n as $a) { yield $a; } }; if( !is_array( $execute ) && !$items instanceof Traversable ) { echo 'ddd'; } else { echo 'aaa'; } /*foreach(execute([1,2,5]) as $n){ echo $n.PHP_EOL; }*/
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $items in /in/TrDh1 on line 8 ddd

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