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<?php $array = array( array("title" => 1, "children" => array( array( "selected" => true, "key" => 12345, "children" => array() ) ) ) ); $selectedValues = array(); $iterator = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($tree)); foreach ($iterator as $key => $value) { if ($key == "selected" && $value) { $selectedValues[] = $iterator["key"]; } } var_dump($selectedValues);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $tree in /in/bQ5sK on line 13 Fatal error: Uncaught TypeError: ArrayIterator::__construct(): Argument #1 ($array) must be of type array, null given in /in/bQ5sK:13 Stack trace: #0 /in/bQ5sK(13): ArrayIterator->__construct(NULL) #1 {main} thrown in /in/bQ5sK on line 13
Process exited with code 255.

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